Math Ratios
posted by Dottie .
A sum of money is shared between Alice, Gayah and Sita in the ratio 3:2:4. If Gayah receives $4,287.50, how much money do Alice and Sita receive altogether.

there are 3+2+4 = 9 parts
a:g:s = 3:2:4, so g = 2 parts
that means 1 part is 2143.75
3*2143.75 : 2*2143.75 : 4:2143.75
= 6431.25 : 4287.50 : 8575.00
a+s = 15006.25