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Finding the Fourth Proportional to 8,616.11, 12,913.73 and 3,929.70

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Solution

The fourth proportional to 8,616.11, 12,913.73 and 3,929.70 is: 5,889.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616.11 : 12,913.73 = 3,929.70 : x
  2. Step 2: Convert to fraction form
    8,616.11/12,913.73 = 3,929.70/x
  3. Step 3: Cross multiply
    8,616.11x = 12,913.73 × 3,929.70
  4. Step 4: Simplify right side
    8,616.11x = 50,747,084.78
  5. Step 5: Solve for x
    x = 50,747,084.78/8,616.11
  6. Step 6: Final answer
    x = 5,889.79

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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.