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Finding the Fourth Proportional to 8,638.62, 12,954.44 and 3,372.88

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Solution

The fourth proportional to 8,638.62, 12,954.44 and 3,372.88 is: 5,057.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.62 : 12,954.44 = 3,372.88 : x
  2. Step 2: Convert to fraction form
    8,638.62/12,954.44 = 3,372.88/x
  3. Step 3: Cross multiply
    8,638.62x = 12,954.44 × 3,372.88
  4. Step 4: Simplify right side
    8,638.62x = 43,693,747.63
  5. Step 5: Solve for x
    x = 43,693,747.63/8,638.62
  6. Step 6: Final answer
    x = 5,057.95

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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.