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Finding the Third Proportional to 17,136 and 20,949

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Solution

The third proportional to 17,136 and 20,949 is: 25,610.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,136 : 20,949 = 20,949 : x
  2. Step 2: Convert to fraction form
    17,136/20,949 = 20,949/x
  3. Step 3: Cross multiply
    17,136x = 20,949 × 20,949
  4. Step 4: Simplify right side
    17,136x = 438,860,601
  5. Step 5: Solve for x
    x = 438,860,601/17,136
  6. Step 6: Final answer
    x = 25,610.45

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.