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Finding the Fourth Proportional to 18,757.13, 28,125.32 and 7,671.60

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Solution

The fourth proportional to 18,757.13, 28,125.32 and 7,671.60 is: 11,503.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.13 : 28,125.32 = 7,671.60 : x
  2. Step 2: Convert to fraction form
    18,757.13/28,125.32 = 7,671.60/x
  3. Step 3: Cross multiply
    18,757.13x = 28,125.32 × 7,671.60
  4. Step 4: Simplify right side
    18,757.13x = 215,766,204.91
  5. Step 5: Solve for x
    x = 215,766,204.91/18,757.13
  6. Step 6: Final answer
    x = 11,503.16

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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.