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Finding the Fourth Proportional to 26,487.78, 39,731.60 and 8,969.92

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Solution

The fourth proportional to 26,487.78, 39,731.60 and 8,969.92 is: 13,454.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,487.78 : 39,731.60 = 8,969.92 : x
  2. Step 2: Convert to fraction form
    26,487.78/39,731.60 = 8,969.92/x
  3. Step 3: Cross multiply
    26,487.78x = 39,731.60 × 8,969.92
  4. Step 4: Simplify right side
    26,487.78x = 356,389,273.47
  5. Step 5: Solve for x
    x = 356,389,273.47/26,487.78
  6. Step 6: Final answer
    x = 13,454.86

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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.