Proportions Calculator

Solve proportions by entering any three values and leaving one blank. The calculator will find the missing value.

Proportion Format: A : B = C : X
Enter any three values, leave one blank to solve for it

This tool solves proportions. It calculates the missing value when you fill in three fields.

How to Use This Tool

Follow these steps:

  1. Decide which value you need to find.
  2. Leave that field blank.
  3. Enter numbers in the other three fields.
  4. Click the Calculate button.

Explanation of Input Fields

A: Enter a number for A. Leave it empty if you want the tool to solve for A.

B: Enter a number for B. Leave it empty if needed.

C: Enter a number for C. Leave it empty if you want to solve for C.

X: Enter a number for X. Leave it empty when you want the calculator to find X.

Understanding the Output

After calculation, the tool shows the complete proportion. It explains the formula, the calculation steps, and the final value. The result is shown in a separate box below the calculator.

Limitations and Notes

Fill in exactly three fields. The tool does not work if more or less than three numbers are provided. The tool does not allow division by zero. Use the Clear button to reset the inputs.

Common Use Cases

This proportions calculator is useful for solving school math problems. It can help with home projects and quick checks. The tool works well for any simple ratio calculation.

Get Started

Enter your numbers and click Calculate. The missing value appears quickly. Reset the fields when you want to start a new calculation.