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Finding the Fourth Proportional to 6,387.91, 8,815.31 and 3,593.41

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Solution

The fourth proportional to 6,387.91, 8,815.31 and 3,593.41 is: 4,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.91 : 8,815.31 = 3,593.41 : x
  2. Step 2: Convert to fraction form
    6,387.91/8,815.31 = 3,593.41/x
  3. Step 3: Cross multiply
    6,387.91x = 8,815.31 × 3,593.41
  4. Step 4: Simplify right side
    6,387.91x = 31,677,023.11
  5. Step 5: Solve for x
    x = 31,677,023.11/6,387.91
  6. Step 6: Final answer
    x = 4,958.90

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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.