Math · Calculator

Proportion Calculator

Solve proportions A:B = C:D.

Find the missing value in a proportion.

D = (B × C) / A

2:4 = 5:D → D = 10.

How to solve a proportion?+

Cross multiply and divide.

Related Tools

MathPopular

Calculate what percentage a part is of a total.

Math

Calculate percentage change between two values.

Math

Convert decimals to fractions.

Math

Convert a decimal to a simplified fraction.

Math

Simplify and compare ratios.

Math

Calculate the average of a set of numbers.