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Finding the Third Proportional to 18,839 and 28,200

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Solution

The third proportional to 18,839 and 28,200 is: 42,212.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,839 : 28,200 = 28,200 : x
  2. Step 2: Convert to fraction form
    18,839/28,200 = 28,200/x
  3. Step 3: Cross multiply
    18,839x = 28,200 × 28,200
  4. Step 4: Simplify right side
    18,839x = 795,240,000
  5. Step 5: Solve for x
    x = 795,240,000/18,839
  6. Step 6: Final answer
    x = 42,212.43

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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.