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Finding the Fourth Proportional to 15,122.22, 20,872 and 8,753.20

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Solution

The fourth proportional to 15,122.22, 20,872 and 8,753.20 is: 12,081.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.22 : 20,872 = 8,753.20 : x
  2. Step 2: Convert to fraction form
    15,122.22/20,872 = 8,753.20/x
  3. Step 3: Cross multiply
    15,122.22x = 20,872 × 8,753.20
  4. Step 4: Simplify right side
    15,122.22x = 182,696,790.40
  5. Step 5: Solve for x
    x = 182,696,790.40/15,122.22
  6. Step 6: Final answer
    x = 12,081.35

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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.