Question

What number needs to be added to 5 and 3 so that the ratio of the first number to the second

becomes 4:3?​

Answer 1

3

Explanation:

Choose a variable to represent the number to be added to 5 and 3.

`(5+x)/(3+x)=(4)/(3)`

"Cross-multiply."

`3(5+x)=4(3+x)\\\\15+3x=12+4x\\\\15=12+x\\\\3=x`

Check: The ratio of 5+3 to 3 + 3 is 8:6, equal to the ratio 4:3.