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Finding the Third Proportional to 20,891 and 29,280

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Solution

The third proportional to 20,891 and 29,280 is: 41,037.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891 : 29,280 = 29,280 : x
  2. Step 2: Convert to fraction form
    20,891/29,280 = 29,280/x
  3. Step 3: Cross multiply
    20,891x = 29,280 × 29,280
  4. Step 4: Simplify right side
    20,891x = 857,318,400
  5. Step 5: Solve for x
    x = 857,318,400/20,891
  6. Step 6: Final answer
    x = 41,037.69

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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.