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Finding the Fourth Proportional to 8,480.78, 12,721.32 and 2,934.26

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Solution

The fourth proportional to 8,480.78, 12,721.32 and 2,934.26 is: 4,401.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.78 : 12,721.32 = 2,934.26 : x
  2. Step 2: Convert to fraction form
    8,480.78/12,721.32 = 2,934.26/x
  3. Step 3: Cross multiply
    8,480.78x = 12,721.32 × 2,934.26
  4. Step 4: Simplify right side
    8,480.78x = 37,327,660.42
  5. Step 5: Solve for x
    x = 37,327,660.42/8,480.78
  6. Step 6: Final answer
    x = 4,401.44

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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.