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Finding the Third Proportional to 6,728 and 11,908

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Solution

The third proportional to 6,728 and 11,908 is: 21,076.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,728 : 11,908 = 11,908 : x
  2. Step 2: Convert to fraction form
    6,728/11,908 = 11,908/x
  3. Step 3: Cross multiply
    6,728x = 11,908 × 11,908
  4. Step 4: Simplify right side
    6,728x = 141,800,464
  5. Step 5: Solve for x
    x = 141,800,464/6,728
  6. Step 6: Final answer
    x = 21,076.17

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.