Solve the proportion: 10/4 = 25/x.
Note
Cross-multiply: 10 × x = 4 × 25. So 10x = 100. Divide by 10: x = 10.
Solve the proportion: 10/4 = 25/x.
Cross-multiply: 10 × x = 4 × 25. So 10x = 100. Divide by 10: x = 10.