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Finding the Third Proportional to 15,884 and 20,887

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Solution

The third proportional to 15,884 and 20,887 is: 27,465.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,884 : 20,887 = 20,887 : x
  2. Step 2: Convert to fraction form
    15,884/20,887 = 20,887/x
  3. Step 3: Cross multiply
    15,884x = 20,887 × 20,887
  4. Step 4: Simplify right side
    15,884x = 436,266,769
  5. Step 5: Solve for x
    x = 436,266,769/15,884
  6. Step 6: Final answer
    x = 27,465.80

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.