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Finding the Third Proportional to 21,186 and 29,079

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Solution

The third proportional to 21,186 and 29,079 is: 39,912.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186 : 29,079 = 29,079 : x
  2. Step 2: Convert to fraction form
    21,186/29,079 = 29,079/x
  3. Step 3: Cross multiply
    21,186x = 29,079 × 29,079
  4. Step 4: Simplify right side
    21,186x = 845,588,241
  5. Step 5: Solve for x
    x = 845,588,241/21,186
  6. Step 6: Final answer
    x = 39,912.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.