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Finding the Third Proportional to 19,638 and 29,390

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Solution

The third proportional to 19,638 and 29,390 is: 43,984.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,638 : 29,390 = 29,390 : x
  2. Step 2: Convert to fraction form
    19,638/29,390 = 29,390/x
  3. Step 3: Cross multiply
    19,638x = 29,390 × 29,390
  4. Step 4: Simplify right side
    19,638x = 863,772,100
  5. Step 5: Solve for x
    x = 863,772,100/19,638
  6. Step 6: Final answer
    x = 43,984.73

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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.