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Finding the Third Proportional to 18,857 and 28,290

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Solution

The third proportional to 18,857 and 28,290 is: 42,441.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,857 : 28,290 = 28,290 : x
  2. Step 2: Convert to fraction form
    18,857/28,290 = 28,290/x
  3. Step 3: Cross multiply
    18,857x = 28,290 × 28,290
  4. Step 4: Simplify right side
    18,857x = 800,324,100
  5. Step 5: Solve for x
    x = 800,324,100/18,857
  6. Step 6: Final answer
    x = 42,441.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.