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Finding the Third Proportional to 8,722 and 13,286

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Solution

The third proportional to 8,722 and 13,286 is: 20,238.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722 : 13,286 = 13,286 : x
  2. Step 2: Convert to fraction form
    8,722/13,286 = 13,286/x
  3. Step 3: Cross multiply
    8,722x = 13,286 × 13,286
  4. Step 4: Simplify right side
    8,722x = 176,517,796
  5. Step 5: Solve for x
    x = 176,517,796/8,722
  6. Step 6: Final answer
    x = 20,238.22

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.