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Finding the Third Proportional to 18,780.75 and 28,125

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Solution

The third proportional to 18,780.75 and 28,125 is: 42,118.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.75 : 28,125 = 28,125 : x
  2. Step 2: Convert to fraction form
    18,780.75/28,125 = 28,125/x
  3. Step 3: Cross multiply
    18,780.75x = 28,125 × 28,125
  4. Step 4: Simplify right side
    18,780.75x = 791,015,625
  5. Step 5: Solve for x
    x = 791,015,625/18,780.75
  6. Step 6: Final answer
    x = 42,118.43

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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.