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Finding the Third Proportional to 18,987.75 and 25,200

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Solution

The third proportional to 18,987.75 and 25,200 is: 33,444.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.75 : 25,200 = 25,200 : x
  2. Step 2: Convert to fraction form
    18,987.75/25,200 = 25,200/x
  3. Step 3: Cross multiply
    18,987.75x = 25,200 × 25,200
  4. Step 4: Simplify right side
    18,987.75x = 635,040,000
  5. Step 5: Solve for x
    x = 635,040,000/18,987.75
  6. Step 6: Final answer
    x = 33,444.72

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.