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Finding the Third Proportional to 15,021 and 16,722

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Solution

The third proportional to 15,021 and 16,722 is: 18,615.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021 : 16,722 = 16,722 : x
  2. Step 2: Convert to fraction form
    15,021/16,722 = 16,722/x
  3. Step 3: Cross multiply
    15,021x = 16,722 × 16,722
  4. Step 4: Simplify right side
    15,021x = 279,625,284
  5. Step 5: Solve for x
    x = 279,625,284/15,021
  6. Step 6: Final answer
    x = 18,615.62

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.