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Finding the Fourth Proportional to 16,761.60, 25,142.40 and 14,947.20

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Solution

The fourth proportional to 16,761.60, 25,142.40 and 14,947.20 is: 22,420.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,761.60 : 25,142.40 = 14,947.20 : x
  2. Step 2: Convert to fraction form
    16,761.60/25,142.40 = 14,947.20/x
  3. Step 3: Cross multiply
    16,761.60x = 25,142.40 × 14,947.20
  4. Step 4: Simplify right side
    16,761.60x = 375,808,481.28
  5. Step 5: Solve for x
    x = 375,808,481.28/16,761.60
  6. Step 6: Final answer
    x = 22,420.80

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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.