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Finding the Fourth Proportional to 6,388.11, 8,815.29 and 3,699.19

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Solution

The fourth proportional to 6,388.11, 8,815.29 and 3,699.19 is: 5,104.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.11 : 8,815.29 = 3,699.19 : x
  2. Step 2: Convert to fraction form
    6,388.11/8,815.29 = 3,699.19/x
  3. Step 3: Cross multiply
    6,388.11x = 8,815.29 × 3,699.19
  4. Step 4: Simplify right side
    6,388.11x = 32,609,432.62
  5. Step 5: Solve for x
    x = 32,609,432.62/6,388.11
  6. Step 6: Final answer
    x = 5,104.71

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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.