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Finding the Third Proportional to 8,919 and 13,320

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Solution

The third proportional to 8,919 and 13,320 is: 19,892.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919 : 13,320 = 13,320 : x
  2. Step 2: Convert to fraction form
    8,919/13,320 = 13,320/x
  3. Step 3: Cross multiply
    8,919x = 13,320 × 13,320
  4. Step 4: Simplify right side
    8,919x = 177,422,400
  5. Step 5: Solve for x
    x = 177,422,400/8,919
  6. Step 6: Final answer
    x = 19,892.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.