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Finding the Fourth Proportional to 8,664, 12,997.35 and 2,819.23

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Solution

The fourth proportional to 8,664, 12,997.35 and 2,819.23 is: 4,229.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664 : 12,997.35 = 2,819.23 : x
  2. Step 2: Convert to fraction form
    8,664/12,997.35 = 2,819.23/x
  3. Step 3: Cross multiply
    8,664x = 12,997.35 × 2,819.23
  4. Step 4: Simplify right side
    8,664x = 36,642,519.04
  5. Step 5: Solve for x
    x = 36,642,519.04/8,664
  6. Step 6: Final answer
    x = 4,229.28

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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.