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Finding the Third Proportional to 12,884 and 20,085

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Solution

The third proportional to 12,884 and 20,085 is: 31,310.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,884 : 20,085 = 20,085 : x
  2. Step 2: Convert to fraction form
    12,884/20,085 = 20,085/x
  3. Step 3: Cross multiply
    12,884x = 20,085 × 20,085
  4. Step 4: Simplify right side
    12,884x = 403,407,225
  5. Step 5: Solve for x
    x = 403,407,225/12,884
  6. Step 6: Final answer
    x = 31,310.71

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.