Proportion Calculator
Proportion Calculator
Proportion Calculator
Solve proportions: A/B = C/D
Formula: A ÷ B = C ÷ D
Cross Multiplication: A × D = B × C
Solve proportion problems A/B = C/D and find missing values. Useful for scaling recipes, maps, and maintaining consistent ratios.
Key Features
Proportion solving
Find missing value
Cross-multiplication
Multiple solve options
Clear formula display
Step-by-step logic
How to Use This Tool
Enter known values for proportion
Enter known values for proportion
Select which value to solve
Select which value to solve for
Click Calculate
Click Calculate
See result using cross-multiplication
See result using cross-multiplication
Clear to start over
Clear to start over
Use Cases
Recipe scaling
Map scaling
Model building
Architectural design
Chemical mixtures
Frequently Asked Questions
What is proportion?
Equation showing two ratios are equal
How is missing value found?
Using cross-multiplication
What is cross-multiplication?
A×D = B×C
Can I solve for any value?
Yes, select which one to find
Tool Information
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