1. What is UK Cross Multiplication?

The UK cross multiplication method is a mathematical technique used to solve for an unknown variable in proportional relationships. It's commonly used in ratio problems and simple algebraic equations.

2. How Does the Calculator Work?

The calculator uses the cross multiplication formula:

Where:

• \( a \) — First numerator value (unitless)
• \( d \) — Second numerator value (unitless)
• \( b \) — Denominator value (unitless)
• \( x \) — Result (unitless)

Explanation: The equation solves for x in the proportional relationship by multiplying the numerator values and dividing by the denominator.

3. Importance of Cross Multiplication

Details: Cross multiplication is fundamental in solving proportions, scaling recipes, calculating percentages, and many real-world applications involving ratios.

4. Using the Calculator

Tips: Enter all three values (a, d, and b). The denominator (b) must not be zero. The calculator will compute the result x.

5. Frequently Asked Questions (FAQ)

Q1: Why is it called "cross" multiplication?
A: Because you multiply diagonally across the proportion (a × d) rather than straight across (a × b).

Q2: Can this be used for fractions?
A: Yes, cross multiplication is commonly used to solve equations with fractions by eliminating denominators.

Q3: What if b is zero?
A: Division by zero is undefined. The calculator will not compute a result if b is zero.

Q4: Are there limitations to this method?
A: It only works for simple proportional relationships. More complex equations may require additional algebraic manipulation.

Q5: How precise are the results?
A: Results are calculated to 4 decimal places for precision while maintaining practical usefulness.