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Finding the Third Proportional to 21,142 and 29,558

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Solution

The third proportional to 21,142 and 29,558 is: 41,324.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142 : 29,558 = 29,558 : x
  2. Step 2: Convert to fraction form
    21,142/29,558 = 29,558/x
  3. Step 3: Cross multiply
    21,142x = 29,558 × 29,558
  4. Step 4: Simplify right side
    21,142x = 873,675,364
  5. Step 5: Solve for x
    x = 873,675,364/21,142
  6. Step 6: Final answer
    x = 41,324.16

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.