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Finding the Fourth Proportional to 20,610.66, 30,916.08 and 8,761.38

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Solution

The fourth proportional to 20,610.66, 30,916.08 and 8,761.38 is: 13,142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,610.66 : 30,916.08 = 8,761.38 : x
  2. Step 2: Convert to fraction form
    20,610.66/30,916.08 = 8,761.38/x
  3. Step 3: Cross multiply
    20,610.66x = 30,916.08 × 8,761.38
  4. Step 4: Simplify right side
    20,610.66x = 270,867,524.99
  5. Step 5: Solve for x
    x = 270,867,524.99/20,610.66
  6. Step 6: Final answer
    x = 13,142.11

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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.