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Finding the Third Proportional to 11,780 and 13,868

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Solution

The third proportional to 11,780 and 13,868 is: 16,326.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,780 : 13,868 = 13,868 : x
  2. Step 2: Convert to fraction form
    11,780/13,868 = 13,868/x
  3. Step 3: Cross multiply
    11,780x = 13,868 × 13,868
  4. Step 4: Simplify right side
    11,780x = 192,321,424
  5. Step 5: Solve for x
    x = 192,321,424/11,780
  6. Step 6: Final answer
    x = 16,326.10

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.