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Finding the Third Proportional to 13,828 and 21,279

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Solution

The third proportional to 13,828 and 21,279 is: 32,744.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,828 : 21,279 = 21,279 : x
  2. Step 2: Convert to fraction form
    13,828/21,279 = 21,279/x
  3. Step 3: Cross multiply
    13,828x = 21,279 × 21,279
  4. Step 4: Simplify right side
    13,828x = 452,795,841
  5. Step 5: Solve for x
    x = 452,795,841/13,828
  6. Step 6: Final answer
    x = 32,744.85

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.