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Finding the Third Proportional to 7,678 and 11,884

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Solution

The third proportional to 7,678 and 11,884 is: 18,394.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678 : 11,884 = 11,884 : x
  2. Step 2: Convert to fraction form
    7,678/11,884 = 11,884/x
  3. Step 3: Cross multiply
    7,678x = 11,884 × 11,884
  4. Step 4: Simplify right side
    7,678x = 141,229,456
  5. Step 5: Solve for x
    x = 141,229,456/7,678
  6. Step 6: Final answer
    x = 18,394.04

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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.