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Finding the Third Proportional to 18,660 and 28,286

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Solution

The third proportional to 18,660 and 28,286 is: 42,877.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660 : 28,286 = 28,286 : x
  2. Step 2: Convert to fraction form
    18,660/28,286 = 28,286/x
  3. Step 3: Cross multiply
    18,660x = 28,286 × 28,286
  4. Step 4: Simplify right side
    18,660x = 800,097,796
  5. Step 5: Solve for x
    x = 800,097,796/18,660
  6. Step 6: Final answer
    x = 42,877.70

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.