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Finding the Third Proportional to 21,531 and 47,306

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Solution

The third proportional to 21,531 and 47,306 is: 103,936.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531 : 47,306 = 47,306 : x
  2. Step 2: Convert to fraction form
    21,531/47,306 = 47,306/x
  3. Step 3: Cross multiply
    21,531x = 47,306 × 47,306
  4. Step 4: Simplify right side
    21,531x = 2,237,857,636
  5. Step 5: Solve for x
    x = 2,237,857,636/21,531
  6. Step 6: Final answer
    x = 103,936.54

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.