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Finding the Fourth Proportional to 8,138.80, 12,218.17 and 5,367.79

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Solution

The fourth proportional to 8,138.80, 12,218.17 and 5,367.79 is: 8,058.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.80 : 12,218.17 = 5,367.79 : x
  2. Step 2: Convert to fraction form
    8,138.80/12,218.17 = 5,367.79/x
  3. Step 3: Cross multiply
    8,138.80x = 12,218.17 × 5,367.79
  4. Step 4: Simplify right side
    8,138.80x = 65,584,592.73
  5. Step 5: Solve for x
    x = 65,584,592.73/8,138.80
  6. Step 6: Final answer
    x = 8,058.26

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1.5x scale

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.