Question

Solve the proportion.
3x / 10 = 9 / 4

Answer 1

x =7.5

Explanation:

We can use cross products to solve

3x / 10 = 9 / 4

3x*4 = 10*9

12x = 90

Divide each side by 12

12x/12 = 90/12

x =7.5