Proportion Solver — Cross Multiply
Solve proportions by finding the unknown value in a/b = c/d equations.
What Is the Proportion Solver — Cross Multiply?
Solves proportions by finding the missing value using cross-multiplication.
Formula
a/b = c/d → Cross multiply: a×d = b×c
How to Use
Enter 3 of 4 values. Leave one empty to solve.
Example Calculation
3/4 = 9/d → d = (4×9)/3 = 12.
Understanding Proportion — Cross Multiply
Proportions are used in scaling recipes, currency conversion, map reading, and similar triangle problems.
Frequently Asked Questions
What is a proportion?
An equation stating two ratios are equal: a/b = c/d.
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