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Finding the Fourth Proportional to 3,939.44, 5,401.08 and 3,869.24

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Solution

The fourth proportional to 3,939.44, 5,401.08 and 3,869.24 is: 5,304.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.44 : 5,401.08 = 3,869.24 : x
  2. Step 2: Convert to fraction form
    3,939.44/5,401.08 = 3,869.24/x
  3. Step 3: Cross multiply
    3,939.44x = 5,401.08 × 3,869.24
  4. Step 4: Simplify right side
    3,939.44x = 20,898,074.78
  5. Step 5: Solve for x
    x = 20,898,074.78/3,939.44
  6. Step 6: Final answer
    x = 5,304.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.