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Finding the Fourth Proportional to 5,918.97, 8,871.03 and 3,138.78

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Solution

The fourth proportional to 5,918.97, 8,871.03 and 3,138.78 is: 4,704.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,918.97 : 8,871.03 = 3,138.78 : x
  2. Step 2: Convert to fraction form
    5,918.97/8,871.03 = 3,138.78/x
  3. Step 3: Cross multiply
    5,918.97x = 8,871.03 × 3,138.78
  4. Step 4: Simplify right side
    5,918.97x = 27,844,211.54
  5. Step 5: Solve for x
    x = 27,844,211.54/5,918.97
  6. Step 6: Final answer
    x = 4,704.23

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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.