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Finding the Fourth Proportional to 28,577.10, 42,865.65 and 8,861.70

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Solution

The fourth proportional to 28,577.10, 42,865.65 and 8,861.70 is: 13,292.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,577.10 : 42,865.65 = 8,861.70 : x
  2. Step 2: Convert to fraction form
    28,577.10/42,865.65 = 8,861.70/x
  3. Step 3: Cross multiply
    28,577.10x = 42,865.65 × 8,861.70
  4. Step 4: Simplify right side
    28,577.10x = 379,862,530.61
  5. Step 5: Solve for x
    x = 379,862,530.61/28,577.10
  6. Step 6: Final answer
    x = 13,292.55

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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.