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Finding the Fourth Proportional to 5,786.90, 8,677.92 and 3,939.02

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Solution

The fourth proportional to 5,786.90, 8,677.92 and 3,939.02 is: 5,906.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,786.90 : 8,677.92 = 3,939.02 : x
  2. Step 2: Convert to fraction form
    5,786.90/8,677.92 = 3,939.02/x
  3. Step 3: Cross multiply
    5,786.90x = 8,677.92 × 3,939.02
  4. Step 4: Simplify right side
    5,786.90x = 34,182,500.44
  5. Step 5: Solve for x
    x = 34,182,500.44/5,786.90
  6. Step 6: Final answer
    x = 5,906.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.