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Finding the Fourth Proportional to 8,871.18, 13,306.83 and 3,939.48

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Solution

The fourth proportional to 8,871.18, 13,306.83 and 3,939.48 is: 5,909.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,871.18 : 13,306.83 = 3,939.48 : x
  2. Step 2: Convert to fraction form
    8,871.18/13,306.83 = 3,939.48/x
  3. Step 3: Cross multiply
    8,871.18x = 13,306.83 × 3,939.48
  4. Step 4: Simplify right side
    8,871.18x = 52,421,990.65
  5. Step 5: Solve for x
    x = 52,421,990.65/8,871.18
  6. Step 6: Final answer
    x = 5,909.25

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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.