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Finding the Fourth Proportional to 8,664.72, 12,992.76 and 2,819.76

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Solution

The fourth proportional to 8,664.72, 12,992.76 and 2,819.76 is: 4,228.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.72 : 12,992.76 = 2,819.76 : x
  2. Step 2: Convert to fraction form
    8,664.72/12,992.76 = 2,819.76/x
  3. Step 3: Cross multiply
    8,664.72x = 12,992.76 × 2,819.76
  4. Step 4: Simplify right side
    8,664.72x = 36,636,464.94
  5. Step 5: Solve for x
    x = 36,636,464.94/8,664.72
  6. Step 6: Final answer
    x = 4,228.23

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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.