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Finding the Third Proportional to 21,479 and 32,515

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Solution

The third proportional to 21,479 and 32,515 is: 49,221.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479 : 32,515 = 32,515 : x
  2. Step 2: Convert to fraction form
    21,479/32,515 = 32,515/x
  3. Step 3: Cross multiply
    21,479x = 32,515 × 32,515
  4. Step 4: Simplify right side
    21,479x = 1,057,225,225
  5. Step 5: Solve for x
    x = 1,057,225,225/21,479
  6. Step 6: Final answer
    x = 49,221.34

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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.