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Finding the Third Proportional to 18,780 and 27,288

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Solution

The third proportional to 18,780 and 27,288 is: 39,650.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780 : 27,288 = 27,288 : x
  2. Step 2: Convert to fraction form
    18,780/27,288 = 27,288/x
  3. Step 3: Cross multiply
    18,780x = 27,288 × 27,288
  4. Step 4: Simplify right side
    18,780x = 744,634,944
  5. Step 5: Solve for x
    x = 744,634,944/18,780
  6. Step 6: Final answer
    x = 39,650.42

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.