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Finding the Third Proportional to 3,408 and 6,912

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Solution

The third proportional to 3,408 and 6,912 is: 14,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408 : 6,912 = 6,912 : x
  2. Step 2: Convert to fraction form
    3,408/6,912 = 6,912/x
  3. Step 3: Cross multiply
    3,408x = 6,912 × 6,912
  4. Step 4: Simplify right side
    3,408x = 47,775,744
  5. Step 5: Solve for x
    x = 47,775,744/3,408
  6. Step 6: Final answer
    x = 14,018.70

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.