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Finding the Fourth Proportional to 28,265.76, 42,398.88 and 8,545.20

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Solution

The fourth proportional to 28,265.76, 42,398.88 and 8,545.20 is: 12,817.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,265.76 : 42,398.88 = 8,545.20 : x
  2. Step 2: Convert to fraction form
    28,265.76/42,398.88 = 8,545.20/x
  3. Step 3: Cross multiply
    28,265.76x = 42,398.88 × 8,545.20
  4. Step 4: Simplify right side
    28,265.76x = 362,306,909.38
  5. Step 5: Solve for x
    x = 362,306,909.38/28,265.76
  6. Step 6: Final answer
    x = 12,817.87

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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.