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Finding the Third Proportional to 6,816 and 11,439

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Solution

The third proportional to 6,816 and 11,439 is: 19,197.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,816 : 11,439 = 11,439 : x
  2. Step 2: Convert to fraction form
    6,816/11,439 = 11,439/x
  3. Step 3: Cross multiply
    6,816x = 11,439 × 11,439
  4. Step 4: Simplify right side
    6,816x = 130,850,721
  5. Step 5: Solve for x
    x = 130,850,721/6,816
  6. Step 6: Final answer
    x = 19,197.58

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Why These Related Problems?

These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.