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Finding the Third Proportional to 6,387 and 13,320

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Solution

The third proportional to 6,387 and 13,320 is: 27,778.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387 : 13,320 = 13,320 : x
  2. Step 2: Convert to fraction form
    6,387/13,320 = 13,320/x
  3. Step 3: Cross multiply
    6,387x = 13,320 × 13,320
  4. Step 4: Simplify right side
    6,387x = 177,422,400
  5. Step 5: Solve for x
    x = 177,422,400/6,387
  6. Step 6: Final answer
    x = 27,778.68

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.