Question

Sylvia, John, and Peter invested their savings in a bank. The ratio of the investment of Sylvia’s to John's is 1: 3 and that of John’s to Peter’s is 4: 5.

What is the investment ratio of Sylvia : John : Peter ?

Answer 1

The ratio is 4:12:15.

Explanation:

we need to make the first ratio (Sylvia's to John's) comparable to second one (John's to Peter's). Since John is in both ratios, we use his number to make it the same. 3 and 4 can both be multiplied into 12. So, multiply the first ratio by 4 and the second by 3.

`(1:3) * 4 = 4:12\\(4:5) * 3 = 12:15`

Put it together, and you get 4:12:15.

Hope it helps :P