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Finding the Third Proportional to 9,780 and 11,892

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Solution

The third proportional to 9,780 and 11,892 is: 14,460.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,780 : 11,892 = 11,892 : x
  2. Step 2: Convert to fraction form
    9,780/11,892 = 11,892/x
  3. Step 3: Cross multiply
    9,780x = 11,892 × 11,892
  4. Step 4: Simplify right side
    9,780x = 141,419,664
  5. Step 5: Solve for x
    x = 141,419,664/9,780
  6. Step 6: Final answer
    x = 14,460.09

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.