I need help. Solve the proportion:

Question

4:x :: -3/8:12

Answer 1

4:x :: -3/8:12

Cross multiply.

(-3/8)x = 48

x = 48 / (-3/8)

x = 48 * (-8/3)

x = (-384/3) = -128

Answer 2

Thank you.

Answer 3

You're welcome.