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Finding the Third Proportional to 11,918 and 18,519

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Solution

The third proportional to 11,918 and 18,519 is: 28,776.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918 : 18,519 = 18,519 : x
  2. Step 2: Convert to fraction form
    11,918/18,519 = 18,519/x
  3. Step 3: Cross multiply
    11,918x = 18,519 × 18,519
  4. Step 4: Simplify right side
    11,918x = 342,953,361
  5. Step 5: Solve for x
    x = 342,953,361/11,918
  6. Step 6: Final answer
    x = 28,776.08

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.