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Finding the Fourth Proportional to 42,652.11, 63,978.17 and 11,487.36

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Solution

The fourth proportional to 42,652.11, 63,978.17 and 11,487.36 is: 17,231.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,652.11 : 63,978.17 = 11,487.36 : x
  2. Step 2: Convert to fraction form
    42,652.11/63,978.17 = 11,487.36/x
  3. Step 3: Cross multiply
    42,652.11x = 63,978.17 × 11,487.36
  4. Step 4: Simplify right side
    42,652.11x = 734,940,270.93
  5. Step 5: Solve for x
    x = 734,940,270.93/42,652.11
  6. Step 6: Final answer
    x = 17,231.04

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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.