CalcCalculadora de Regla de Tres
Last updated: 2026-08-24
Calculadora de Regla de Tres — Resuelve proporciones directas: si a es a b como c es a x, calcula x.
Inputs
Result
Enter values and press Calculate
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How to use it
- [object Object]
- [object Object]
- [object Object]
- [object Object]
Common mistakes
- ⚠️ Setting up the proportion incorrectly (wrong position of values)
- ⚠️ Not ensuring the relationship is truly proportional before applying
- ⚠️ Dividing by a when a equals zero, causing calculation error
Worked example
If 7.5kg of materials cost $22.50, find the cost of 12.8kg using direct proportion
The result x ({x}) is the unknown fourth value in the proportion a:b :: c:x, solving for equivalent ratios in direct proportion problems.
Input guide
| Field | Typical range |
|---|---|
| a | Must be non-zero; typical ratios: 1-1000 |
| b | Corresponds to a; same magnitude range |
| c | The known value to find equivalent for; any magnitude |