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Finding the Third Proportional to 4,222 and 9,116

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Solution

The third proportional to 4,222 and 9,116 is: 19,682.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,222 : 9,116 = 9,116 : x
  2. Step 2: Convert to fraction form
    4,222/9,116 = 9,116/x
  3. Step 3: Cross multiply
    4,222x = 9,116 × 9,116
  4. Step 4: Simplify right side
    4,222x = 83,101,456
  5. Step 5: Solve for x
    x = 83,101,456/4,222
  6. Step 6: Final answer
    x = 19,682.96

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.