What Is a Ratio Calculator?
A ratio calculator solves proportion equations of the form A : B = C : D. Leave any one field empty to automatically compute the missing term using cross-multiplication.
Ratio Calculator
Ratio Calculator
Proportion: A : B = C : D (Leave 1 empty to solve)
:
=:
Solved Value (D)
9.0000
Frequently Asked Questions
What is a ratio?
A ratio expresses the relative sizes of two or more values, showing how much of one thing there is compared to another (e.g. 2:3).
How do you solve a proportion A:B = C:D?
Use cross-multiplication: A × D = B × C. If one value is unknown (e.g., X), solve the resulting linear equation.
How do you simplify a ratio?
Divide both terms of the ratio by their Greatest Common Divisor (GCD) until no common factors remain.
What is the difference between a ratio and a fraction?
A ratio compares part-to-part or part-to-whole quantities, whereas a fraction specifically represents a part of a whole.
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MathFeatures & Highlights
- Solve Missing Term Proportions