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Finding the Fourth Proportional to 18,757.73, 28,132.87 and 5,432.28

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Solution

The fourth proportional to 18,757.73, 28,132.87 and 5,432.28 is: 8,147.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.73 : 28,132.87 = 5,432.28 : x
  2. Step 2: Convert to fraction form
    18,757.73/28,132.87 = 5,432.28/x
  3. Step 3: Cross multiply
    18,757.73x = 28,132.87 × 5,432.28
  4. Step 4: Simplify right side
    18,757.73x = 152,825,627.04
  5. Step 5: Solve for x
    x = 152,825,627.04/18,757.73
  6. Step 6: Final answer
    x = 8,147.34

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1.5x scale

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.