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Finding the Fourth Proportional to 15,167.20, 20,930.42 and 8,452.80

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Solution

The fourth proportional to 15,167.20, 20,930.42 and 8,452.80 is: 11,664.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,167.20 : 20,930.42 = 8,452.80 : x
  2. Step 2: Convert to fraction form
    15,167.20/20,930.42 = 8,452.80/x
  3. Step 3: Cross multiply
    15,167.20x = 20,930.42 × 8,452.80
  4. Step 4: Simplify right side
    15,167.20x = 176,920,654.18
  5. Step 5: Solve for x
    x = 176,920,654.18/15,167.20
  6. Step 6: Final answer
    x = 11,664.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.