Ratio Calculator

Solve ratios, find missing values, and scale proportions.

Solve Ratio Proportion

Find X in: A:B = C:X

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Missing Value (X)

Understanding Ratios

If A:B = C:X, then X = (B × C) ÷ A

Example: 2:3 = 10:X

X = (3 × 10) ÷ 2 = 15