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Finding the Fourth Proportional to 42,675.92, 63,960.12 and 20,471.12

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Solution

The fourth proportional to 42,675.92, 63,960.12 and 20,471.12 is: 30,680.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,675.92 : 63,960.12 = 20,471.12 : x
  2. Step 2: Convert to fraction form
    42,675.92/63,960.12 = 20,471.12/x
  3. Step 3: Cross multiply
    42,675.92x = 63,960.12 × 20,471.12
  4. Step 4: Simplify right side
    42,675.92x = 1,309,335,291.73
  5. Step 5: Solve for x
    x = 1,309,335,291.73/42,675.92
  6. Step 6: Final answer
    x = 30,680.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.