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Finding the Third Proportional to 13,940 and 29,980

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Solution

The third proportional to 13,940 and 29,980 is: 64,476.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940 : 29,980 = 29,980 : x
  2. Step 2: Convert to fraction form
    13,940/29,980 = 29,980/x
  3. Step 3: Cross multiply
    13,940x = 29,980 × 29,980
  4. Step 4: Simplify right side
    13,940x = 898,800,400
  5. Step 5: Solve for x
    x = 898,800,400/13,940
  6. Step 6: Final answer
    x = 64,476.36

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.