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Finding the Fourth Proportional to 8,266.86, 12,400.29 and 2,721.79

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Solution

The fourth proportional to 8,266.86, 12,400.29 and 2,721.79 is: 4,082.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,266.86 : 12,400.29 = 2,721.79 : x
  2. Step 2: Convert to fraction form
    8,266.86/12,400.29 = 2,721.79/x
  3. Step 3: Cross multiply
    8,266.86x = 12,400.29 × 2,721.79
  4. Step 4: Simplify right side
    8,266.86x = 33,750,983.38
  5. Step 5: Solve for x
    x = 33,750,983.38/8,266.86
  6. Step 6: Final answer
    x = 4,082.68

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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.