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Ratio Simplifier and Proportion Solver

Solve a proportion in the form a:b = c:x.

Your inputs

Your result

Enter your information and select Calculate to see the result.

How this calculator works

Cross multiplication gives x = b × c ÷ a.

Change one assumption at a time to see which inputs have the greatest effect on the estimate.

Worked example

For 2:3 = 4:x, x is 6.

Limitations

This calculator is for educational use; verify important work independently.

Review this educational estimate against current quotes, official information, and your own budget before making a financial decision.