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Finding the Fourth Proportional to 15,070.20, 20,793.06 and 8,781.24

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Solution

The fourth proportional to 15,070.20, 20,793.06 and 8,781.24 is: 12,115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,070.20 : 20,793.06 = 8,781.24 : x
  2. Step 2: Convert to fraction form
    15,070.20/20,793.06 = 8,781.24/x
  3. Step 3: Cross multiply
    15,070.20x = 20,793.06 × 8,781.24
  4. Step 4: Simplify right side
    15,070.20x = 182,588,850.19
  5. Step 5: Solve for x
    x = 182,588,850.19/15,070.20
  6. Step 6: Final answer
    x = 12,115.89

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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.