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Finding the Fourth Proportional to 6,167.13, 8,511.57 and 3,930

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Solution

The fourth proportional to 6,167.13, 8,511.57 and 3,930 is: 5,423.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,167.13 : 8,511.57 = 3,930 : x
  2. Step 2: Convert to fraction form
    6,167.13/8,511.57 = 3,930/x
  3. Step 3: Cross multiply
    6,167.13x = 8,511.57 × 3,930
  4. Step 4: Simplify right side
    6,167.13x = 33,450,470.10
  5. Step 5: Solve for x
    x = 33,450,470.10/6,167.13
  6. Step 6: Final answer
    x = 5,423.99

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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.