Example 1
Value A: 10; Value B: 20; Value C: 5; Find Missing Value: Value D
Value D: 10; Value C: 5; Value B: 20; Value A: 10; Result: 10
Proportion Calculator
Math0.0(0)
Solves proportion problems (e.g., finding a missing value in 'a/b = c/d').
More tools:Math & Statistics Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Value A, Value B, Value C, and Find Missing Value in the units shown.
Step 2
Read Value D, Value C, Value B, Value A, and Result in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Example 2
Value A: 5; Value B: 10; Value C: 15; Find Missing Value: Value D
Value D: 30; Value C: 15; Value B: 10; Value A: 5; Result: 30
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