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Finding the Third Proportional to 12,920 and 27,992

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Solution

The third proportional to 12,920 and 27,992 is: 60,646.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920 : 27,992 = 27,992 : x
  2. Step 2: Convert to fraction form
    12,920/27,992 = 27,992/x
  3. Step 3: Cross multiply
    12,920x = 27,992 × 27,992
  4. Step 4: Simplify right side
    12,920x = 783,552,064
  5. Step 5: Solve for x
    x = 783,552,064/12,920
  6. Step 6: Final answer
    x = 60,646.44

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.