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Finding the Third Proportional to 18,986 and 28,372

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Solution

The third proportional to 18,986 and 28,372 is: 42,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986 : 28,372 = 28,372 : x
  2. Step 2: Convert to fraction form
    18,986/28,372 = 28,372/x
  3. Step 3: Cross multiply
    18,986x = 28,372 × 28,372
  4. Step 4: Simplify right side
    18,986x = 804,970,384
  5. Step 5: Solve for x
    x = 804,970,384/18,986
  6. Step 6: Final answer
    x = 42,398.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.