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Finding the Third Proportional to 8,682 and 21,219

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Solution

The third proportional to 8,682 and 21,219 is: 51,859.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682 : 21,219 = 21,219 : x
  2. Step 2: Convert to fraction form
    8,682/21,219 = 21,219/x
  3. Step 3: Cross multiply
    8,682x = 21,219 × 21,219
  4. Step 4: Simplify right side
    8,682x = 450,245,961
  5. Step 5: Solve for x
    x = 450,245,961/8,682
  6. Step 6: Final answer
    x = 51,859.71

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Why These Related Problems?

These problems maintain the same ratio (2.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.