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Finding the Third Proportional to 8,221 and 13,355

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Solution

The third proportional to 8,221 and 13,355 is: 21,695.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,221 : 13,355 = 13,355 : x
  2. Step 2: Convert to fraction form
    8,221/13,355 = 13,355/x
  3. Step 3: Cross multiply
    8,221x = 13,355 × 13,355
  4. Step 4: Simplify right side
    8,221x = 178,356,025
  5. Step 5: Solve for x
    x = 178,356,025/8,221
  6. Step 6: Final answer
    x = 21,695.17

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.