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Finding the Fourth Proportional to 8,781.22, 12,122.49 and 6,787.27

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Solution

The fourth proportional to 8,781.22, 12,122.49 and 6,787.27 is: 9,369.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.22 : 12,122.49 = 6,787.27 : x
  2. Step 2: Convert to fraction form
    8,781.22/12,122.49 = 6,787.27/x
  3. Step 3: Cross multiply
    8,781.22x = 12,122.49 × 6,787.27
  4. Step 4: Simplify right side
    8,781.22x = 82,278,612.70
  5. Step 5: Solve for x
    x = 82,278,612.70/8,781.22
  6. Step 6: Final answer
    x = 9,369.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.