Home / 13,631.80-18,811.96-7,663.42

Finding the Fourth Proportional to 13,631.80, 18,811.96 and 7,663.42

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Solution

The fourth proportional to 13,631.80, 18,811.96 and 7,663.42 is: 10,575.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.80 : 18,811.96 = 7,663.42 : x
  2. Step 2: Convert to fraction form
    13,631.80/18,811.96 = 7,663.42/x
  3. Step 3: Cross multiply
    13,631.80x = 18,811.96 × 7,663.42
  4. Step 4: Simplify right side
    13,631.80x = 144,163,856.44
  5. Step 5: Solve for x
    x = 144,163,856.44/13,631.80
  6. Step 6: Final answer
    x = 10,575.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.