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Finding the Third Proportional to 4,642 and 9,374

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Solution

The third proportional to 4,642 and 9,374 is: 18,929.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,642 : 9,374 = 9,374 : x
  2. Step 2: Convert to fraction form
    4,642/9,374 = 9,374/x
  3. Step 3: Cross multiply
    4,642x = 9,374 × 9,374
  4. Step 4: Simplify right side
    4,642x = 87,871,876
  5. Step 5: Solve for x
    x = 87,871,876/4,642
  6. Step 6: Final answer
    x = 18,929.74

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.