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Finding the Third Proportional to 20,378 and 31,548

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Solution

The third proportional to 20,378 and 31,548 is: 48,840.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378 : 31,548 = 31,548 : x
  2. Step 2: Convert to fraction form
    20,378/31,548 = 31,548/x
  3. Step 3: Cross multiply
    20,378x = 31,548 × 31,548
  4. Step 4: Simplify right side
    20,378x = 995,276,304
  5. Step 5: Solve for x
    x = 995,276,304/20,378
  6. Step 6: Final answer
    x = 48,840.73

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.