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Finding the Third Proportional to 12,390.75 and 18,600.75

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Solution

The third proportional to 12,390.75 and 18,600.75 is: 27,923.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.75 : 18,600.75 = 18,600.75 : x
  2. Step 2: Convert to fraction form
    12,390.75/18,600.75 = 18,600.75/x
  3. Step 3: Cross multiply
    12,390.75x = 18,600.75 × 18,600.75
  4. Step 4: Simplify right side
    12,390.75x = 345,987,900.56
  5. Step 5: Solve for x
    x = 345,987,900.56/12,390.75
  6. Step 6: Final answer
    x = 27,923.08

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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.