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Finding the Third Proportional to 11,820 and 18,190

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Solution

The third proportional to 11,820 and 18,190 is: 27,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820 : 18,190 = 18,190 : x
  2. Step 2: Convert to fraction form
    11,820/18,190 = 18,190/x
  3. Step 3: Cross multiply
    11,820x = 18,190 × 18,190
  4. Step 4: Simplify right side
    11,820x = 330,876,100
  5. Step 5: Solve for x
    x = 330,876,100/11,820
  6. Step 6: Final answer
    x = 27,992.90

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.