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Finding the Fourth Proportional to 15,067.50, 20,793.15 and 8,781.09

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Solution

The fourth proportional to 15,067.50, 20,793.15 and 8,781.09 is: 12,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,067.50 : 20,793.15 = 8,781.09 : x
  2. Step 2: Convert to fraction form
    15,067.50/20,793.15 = 8,781.09/x
  3. Step 3: Cross multiply
    15,067.50x = 20,793.15 × 8,781.09
  4. Step 4: Simplify right side
    15,067.50x = 182,586,521.53
  5. Step 5: Solve for x
    x = 182,586,521.53/15,067.50
  6. Step 6: Final answer
    x = 12,117.90

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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.