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Finding the Third Proportional to 18,390 and 27,579

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Solution

The third proportional to 18,390 and 27,579 is: 41,359.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390 : 27,579 = 27,579 : x
  2. Step 2: Convert to fraction form
    18,390/27,579 = 27,579/x
  3. Step 3: Cross multiply
    18,390x = 27,579 × 27,579
  4. Step 4: Simplify right side
    18,390x = 760,601,241
  5. Step 5: Solve for x
    x = 760,601,241/18,390
  6. Step 6: Final answer
    x = 41,359.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.