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Finding the Third Proportional to 8,920 and 18,836

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Solution

The third proportional to 8,920 and 18,836 is: 39,775.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920 : 18,836 = 18,836 : x
  2. Step 2: Convert to fraction form
    8,920/18,836 = 18,836/x
  3. Step 3: Cross multiply
    8,920x = 18,836 × 18,836
  4. Step 4: Simplify right side
    8,920x = 354,794,896
  5. Step 5: Solve for x
    x = 354,794,896/8,920
  6. Step 6: Final answer
    x = 39,775.21

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.