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Finding the Third Proportional to 4,992 and 11,916

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Solution

The third proportional to 4,992 and 11,916 is: 28,443.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,992 : 11,916 = 11,916 : x
  2. Step 2: Convert to fraction form
    4,992/11,916 = 11,916/x
  3. Step 3: Cross multiply
    4,992x = 11,916 × 11,916
  4. Step 4: Simplify right side
    4,992x = 141,991,056
  5. Step 5: Solve for x
    x = 141,991,056/4,992
  6. Step 6: Final answer
    x = 28,443.72

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.