Direct Proportion Calculator

Find the missing value in a direct proportion.

How it is calculated

Cross-multiplication solves for the unknown value, the same method used in the general Proportion calculator.

Formula

Solve: A:B = C:X, cross-multiplied

Frequently asked questions

What makes a proportion 'direct'?

In a direct proportion, both amounts go up or down together, at the same rate. If you double one, the other one doubles too.