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Finding the Third Proportional to 8,112 and 18,642

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Solution

The third proportional to 8,112 and 18,642 is: 42,840.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112 : 18,642 = 18,642 : x
  2. Step 2: Convert to fraction form
    8,112/18,642 = 18,642/x
  3. Step 3: Cross multiply
    8,112x = 18,642 × 18,642
  4. Step 4: Simplify right side
    8,112x = 347,524,164
  5. Step 5: Solve for x
    x = 347,524,164/8,112
  6. Step 6: Final answer
    x = 42,840.75

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.