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Finding the Third Proportional to 18,679.50 and 28,158.75

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Solution

The third proportional to 18,679.50 and 28,158.75 is: 42,448.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.50 : 28,158.75 = 28,158.75 : x
  2. Step 2: Convert to fraction form
    18,679.50/28,158.75 = 28,158.75/x
  3. Step 3: Cross multiply
    18,679.50x = 28,158.75 × 28,158.75
  4. Step 4: Simplify right side
    18,679.50x = 792,915,201.56
  5. Step 5: Solve for x
    x = 792,915,201.56/18,679.50
  6. Step 6: Final answer
    x = 42,448.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.