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Finding the Fourth Proportional to 6,339.79, 8,747.85 and 3,687.31

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Solution

The fourth proportional to 6,339.79, 8,747.85 and 3,687.31 is: 5,087.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,339.79 : 8,747.85 = 3,687.31 : x
  2. Step 2: Convert to fraction form
    6,339.79/8,747.85 = 3,687.31/x
  3. Step 3: Cross multiply
    6,339.79x = 8,747.85 × 3,687.31
  4. Step 4: Simplify right side
    6,339.79x = 32,256,034.78
  5. Step 5: Solve for x
    x = 32,256,034.78/6,339.79
  6. Step 6: Final answer
    x = 5,087.87

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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.