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Finding the Fourth Proportional to 6,388.11, 8,815.50 and 3,593.61

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Solution

The fourth proportional to 6,388.11, 8,815.50 and 3,593.61 is: 4,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.11 : 8,815.50 = 3,593.61 : x
  2. Step 2: Convert to fraction form
    6,388.11/8,815.50 = 3,593.61/x
  3. Step 3: Cross multiply
    6,388.11x = 8,815.50 × 3,593.61
  4. Step 4: Simplify right side
    6,388.11x = 31,679,468.96
  5. Step 5: Solve for x
    x = 31,679,468.96/6,388.11
  6. Step 6: Final answer
    x = 4,959.13

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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.