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Finding the Third Proportional to 6,840 and 13,932

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Solution

The third proportional to 6,840 and 13,932 is: 28,377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,840 : 13,932 = 13,932 : x
  2. Step 2: Convert to fraction form
    6,840/13,932 = 13,932/x
  3. Step 3: Cross multiply
    6,840x = 13,932 × 13,932
  4. Step 4: Simplify right side
    6,840x = 194,100,624
  5. Step 5: Solve for x
    x = 194,100,624/6,840
  6. Step 6: Final answer
    x = 28,377.28

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.