Do the ratios 8/50 and 4/10 form a proportion

Cross multiply:

8 * 10 = 50 * 4

Simplifying

8 * 10 = 50 * 4

Multiply 8 * 10

80 = 50 * 4

Multiply 50 * 4

80 = 200

Solving

80 = 200

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution