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Finding the Third Proportional to 8,655 and 21,192

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Solution

The third proportional to 8,655 and 21,192 is: 51,889.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655 : 21,192 = 21,192 : x
  2. Step 2: Convert to fraction form
    8,655/21,192 = 21,192/x
  3. Step 3: Cross multiply
    8,655x = 21,192 × 21,192
  4. Step 4: Simplify right side
    8,655x = 449,100,864
  5. Step 5: Solve for x
    x = 449,100,864/8,655
  6. Step 6: Final answer
    x = 51,889.18

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Why These Related Problems?

These problems maintain the same ratio (2.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.