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Finding the Fourth Proportional to 8,664.32, 12,977.04 and 8,372.72

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Solution

The fourth proportional to 8,664.32, 12,977.04 and 8,372.72 is: 12,540.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.32 : 12,977.04 = 8,372.72 : x
  2. Step 2: Convert to fraction form
    8,664.32/12,977.04 = 8,372.72/x
  3. Step 3: Cross multiply
    8,664.32x = 12,977.04 × 8,372.72
  4. Step 4: Simplify right side
    8,664.32x = 108,653,122.35
  5. Step 5: Solve for x
    x = 108,653,122.35/8,664.32
  6. Step 6: Final answer
    x = 12,540.29

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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.