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Finding the Third Proportional to 12,638 and 18,958

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Solution

The third proportional to 12,638 and 18,958 is: 28,438.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638 : 18,958 = 18,958 : x
  2. Step 2: Convert to fraction form
    12,638/18,958 = 18,958/x
  3. Step 3: Cross multiply
    12,638x = 18,958 × 18,958
  4. Step 4: Simplify right side
    12,638x = 359,405,764
  5. Step 5: Solve for x
    x = 359,405,764/12,638
  6. Step 6: Final answer
    x = 28,438.50

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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.