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Finding the Fourth Proportional to 40,487.20, 60,687.60 and 15,517.60

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Solution

The fourth proportional to 40,487.20, 60,687.60 and 15,517.60 is: 23,259.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,487.20 : 60,687.60 = 15,517.60 : x
  2. Step 2: Convert to fraction form
    40,487.20/60,687.60 = 15,517.60/x
  3. Step 3: Cross multiply
    40,487.20x = 60,687.60 × 15,517.60
  4. Step 4: Simplify right side
    40,487.20x = 941,725,901.76
  5. Step 5: Solve for x
    x = 941,725,901.76/40,487.20
  6. Step 6: Final answer
    x = 23,259.84

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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.