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Finding the Fourth Proportional to 12,648, 18,972 and 3,414

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Solution

The fourth proportional to 12,648, 18,972 and 3,414 is: 5,121

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,648 : 18,972 = 3,414 : x
  2. Step 2: Convert to fraction form
    12,648/18,972 = 3,414/x
  3. Step 3: Cross multiply
    12,648x = 18,972 × 3,414
  4. Step 4: Simplify right side
    12,648x = 64,770,408
  5. Step 5: Solve for x
    x = 64,770,408/12,648
  6. Step 6: Final answer
    x = 5,121

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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.