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Finding the Third Proportional to 6,928 and 11,910

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Solution

The third proportional to 6,928 and 11,910 is: 20,474.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,928 : 11,910 = 11,910 : x
  2. Step 2: Convert to fraction form
    6,928/11,910 = 11,910/x
  3. Step 3: Cross multiply
    6,928x = 11,910 × 11,910
  4. Step 4: Simplify right side
    6,928x = 141,848,100
  5. Step 5: Solve for x
    x = 141,848,100/6,928
  6. Step 6: Final answer
    x = 20,474.61

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.