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Finding the Third Proportional to 11,778.75 and 18,987.75

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Solution

The third proportional to 11,778.75 and 18,987.75 is: 30,608.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,778.75 : 18,987.75 = 18,987.75 : x
  2. Step 2: Convert to fraction form
    11,778.75/18,987.75 = 18,987.75/x
  3. Step 3: Cross multiply
    11,778.75x = 18,987.75 × 18,987.75
  4. Step 4: Simplify right side
    11,778.75x = 360,534,650.06
  5. Step 5: Solve for x
    x = 360,534,650.06/11,778.75
  6. Step 6: Final answer
    x = 30,608.91

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.