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Finding the Fourth Proportional to 8,663.13, 12,997.71 and 2,819.70

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Solution

The fourth proportional to 8,663.13, 12,997.71 and 2,819.70 is: 4,230.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.13 : 12,997.71 = 2,819.70 : x
  2. Step 2: Convert to fraction form
    8,663.13/12,997.71 = 2,819.70/x
  3. Step 3: Cross multiply
    8,663.13x = 12,997.71 × 2,819.70
  4. Step 4: Simplify right side
    8,663.13x = 36,649,642.89
  5. Step 5: Solve for x
    x = 36,649,642.89/8,663.13
  6. Step 6: Final answer
    x = 4,230.53

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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.