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Finding the Fourth Proportional to 16,917.20, 25,375.80 and 8,147.60

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Solution

The fourth proportional to 16,917.20, 25,375.80 and 8,147.60 is: 12,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,917.20 : 25,375.80 = 8,147.60 : x
  2. Step 2: Convert to fraction form
    16,917.20/25,375.80 = 8,147.60/x
  3. Step 3: Cross multiply
    16,917.20x = 25,375.80 × 8,147.60
  4. Step 4: Simplify right side
    16,917.20x = 206,751,868.08
  5. Step 5: Solve for x
    x = 206,751,868.08/16,917.20
  6. Step 6: Final answer
    x = 12,221.40

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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.