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Finding the Third Proportional to 18,685 and 28,251

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Solution

The third proportional to 18,685 and 28,251 is: 42,714.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685 : 28,251 = 28,251 : x
  2. Step 2: Convert to fraction form
    18,685/28,251 = 28,251/x
  3. Step 3: Cross multiply
    18,685x = 28,251 × 28,251
  4. Step 4: Simplify right side
    18,685x = 798,119,001
  5. Step 5: Solve for x
    x = 798,119,001/18,685
  6. Step 6: Final answer
    x = 42,714.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.