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Finding the Third Proportional to 18,937.13 and 28,405.69

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Solution

The third proportional to 18,937.13 and 28,405.69 is: 42,608.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.13 : 28,405.69 = 28,405.69 : x
  2. Step 2: Convert to fraction form
    18,937.13/28,405.69 = 28,405.69/x
  3. Step 3: Cross multiply
    18,937.13x = 28,405.69 × 28,405.69
  4. Step 4: Simplify right side
    18,937.13x = 806,883,082.35
  5. Step 5: Solve for x
    x = 806,883,082.35/18,937.13
  6. Step 6: Final answer
    x = 42,608.53

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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.