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Finding the Third Proportional to 18,722 and 28,691

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Solution

The third proportional to 18,722 and 28,691 is: 43,968.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722 : 28,691 = 28,691 : x
  2. Step 2: Convert to fraction form
    18,722/28,691 = 28,691/x
  3. Step 3: Cross multiply
    18,722x = 28,691 × 28,691
  4. Step 4: Simplify right side
    18,722x = 823,173,481
  5. Step 5: Solve for x
    x = 823,173,481/18,722
  6. Step 6: Final answer
    x = 43,968.24

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.