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Finding the Fourth Proportional to 20,600.78, 30,845.81 and 16,947.12

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Solution

The fourth proportional to 20,600.78, 30,845.81 and 16,947.12 is: 25,375.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.78 : 30,845.81 = 16,947.12 : x
  2. Step 2: Convert to fraction form
    20,600.78/30,845.81 = 16,947.12/x
  3. Step 3: Cross multiply
    20,600.78x = 30,845.81 × 16,947.12
  4. Step 4: Simplify right side
    20,600.78x = 522,747,801.61
  5. Step 5: Solve for x
    x = 522,747,801.61/20,600.78
  6. Step 6: Final answer
    x = 25,375.15

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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.