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Finding the Third Proportional to 3,929 and 8,176

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Solution

The third proportional to 3,929 and 8,176 is: 17,013.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929 : 8,176 = 8,176 : x
  2. Step 2: Convert to fraction form
    3,929/8,176 = 8,176/x
  3. Step 3: Cross multiply
    3,929x = 8,176 × 8,176
  4. Step 4: Simplify right side
    3,929x = 66,846,976
  5. Step 5: Solve for x
    x = 66,846,976/3,929
  6. Step 6: Final answer
    x = 17,013.74

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.