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Finding the Fourth Proportional to 28,581.66, 42,861.96 and 9,856.89

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Solution

The fourth proportional to 28,581.66, 42,861.96 and 9,856.89 is: 14,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,581.66 : 42,861.96 = 9,856.89 : x
  2. Step 2: Convert to fraction form
    28,581.66/42,861.96 = 9,856.89/x
  3. Step 3: Cross multiply
    28,581.66x = 42,861.96 × 9,856.89
  4. Step 4: Simplify right side
    28,581.66x = 422,485,624.90
  5. Step 5: Solve for x
    x = 422,485,624.90/28,581.66
  6. Step 6: Final answer
    x = 14,781.70

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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.