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Finding the Third Proportional to 5,922 and 8,415

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Solution

The third proportional to 5,922 and 8,415 is: 11,957.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,922 : 8,415 = 8,415 : x
  2. Step 2: Convert to fraction form
    5,922/8,415 = 8,415/x
  3. Step 3: Cross multiply
    5,922x = 8,415 × 8,415
  4. Step 4: Simplify right side
    5,922x = 70,812,225
  5. Step 5: Solve for x
    x = 70,812,225/5,922
  6. Step 6: Final answer
    x = 11,957.48

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.