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Cross-Multiplication Checker — result sheet
Compare two fractions by cross-multiplying their numerators and denominators.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: a/b compared with c/d uses the products ad and cb; equality holds when ad=cb.
Cross products let visitors compare or verify a proportion without converting either fraction to a decimal first.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Left numerator — minimum -1000000000; maximum 1000000000
- Left denominator — minimum 1.0E-6; maximum 1000000000
- Right numerator — minimum -1000000000; maximum 1000000000
- Right denominator — minimum 1.0E-6; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Left numerator | 2 |
| Left denominator | 3 |
| Right numerator | 8 |
| Right denominator | 12 |
Cross-products are 24 and 24; the two fractions are equal.
Assumptions and limits
- Both denominators are nonzero and all values use the same numeric units.
- The equality indicator is exact within a small floating-point tolerance.
- For solving an unknown, substitute the unknown into the corresponding cross-product equation.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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