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Finding the Third Proportional to 21,450 and 32,311

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Solution

The third proportional to 21,450 and 32,311 is: 48,671.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,450 : 32,311 = 32,311 : x
  2. Step 2: Convert to fraction form
    21,450/32,311 = 32,311/x
  3. Step 3: Cross multiply
    21,450x = 32,311 × 32,311
  4. Step 4: Simplify right side
    21,450x = 1,044,000,721
  5. Step 5: Solve for x
    x = 1,044,000,721/21,450
  6. Step 6: Final answer
    x = 48,671.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.