18:30 = 24: ?
explain how i find it as well xD
2006-11-05 00:25:34 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
18:30 = 24 : x
x(18) = (30)(24)
x = [(30)(24)]/18
x = 720/18
x = 40
2006-11-05 00:32:55 · answer #1 · answered by honeymay 2 · 0⤊ 0⤋
18:30=3:5=24:40
2006-11-05 08:28:47 · answer #2 · answered by . 3 · 1⤊ 0⤋
A fraction is also known as a ratio, in this case you're looking to find out the equivalent fraction (or ratio) between 18/30 and 24/x.
These two values are equal to each other, so set up an equation
18/30 = 24/x
multiply each side by 30
18 = (24/x)(30)
18 = 720/x
multiply each side by x
18x = 720
get x by itself and divide each side by 18
x = 40
so the final answer would be
the ratio of 18:30 = the ratio of 24:40
to check this, reduce each ratio
take a 6 out of 18:30 and you'll get a ratio of 3:5 (6 is a common factor)
take an 8 out of 24:40 and again you'll get a ratio of 3:5
the two are equivalent!!
2006-11-05 08:40:08 · answer #3 · answered by Mudmutt 2 · 0⤊ 0⤋
18:30 = 24: ?
This is a classic problem of proportion. 18:30 is a ratio. 24:? is the other. In order for them to be in proportion, the product of the extremes must equal the product of the means. In other words:
24*30 = 18*?
720 = 18*?
18*? = 720
? = 720/18
= 40
The missing number is 40
2006-11-05 09:04:47 · answer #4 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
18:30 = 24: x
(30)(24)=18x
720 =18x
720 divided by 18 = x
40 = x
2006-11-05 08:38:19 · answer #5 · answered by OnThe36th 5 · 0⤊ 0⤋
40
2006-11-05 08:35:25 · answer #6 · answered by Binangkaw 2 · 0⤊ 0⤋
18:30 when simplified gives 3:5
like wise
24:40 when simplified gives 3:5
not quiet sure whether this is what is required by u
2006-11-05 08:32:26 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Follow HoneyMay's procedure and you can't go wrong. Multiply the two outer numbers and multiply the two inner numbers, set the products equal and solve.
2006-11-05 08:35:38 · answer #8 · answered by ? 6 · 0⤊ 0⤋
45
18 is to 30 as 24 is to ?. 24 = 18 * 1.5, so multiply 30 * 1.5 & you get 45.
2006-11-05 08:27:34 · answer #9 · answered by DDK 2 · 0⤊ 2⤋
answer is 40 as product of means =product of extremes
2006-11-05 13:27:46 · answer #10 · answered by gautam 1 · 0⤊ 0⤋