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Finding the Third Proportional to 20,878 and 43,480

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Solution

The third proportional to 20,878 and 43,480 is: 90,550.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878 : 43,480 = 43,480 : x
  2. Step 2: Convert to fraction form
    20,878/43,480 = 43,480/x
  3. Step 3: Cross multiply
    20,878x = 43,480 × 43,480
  4. Step 4: Simplify right side
    20,878x = 1,890,510,400
  5. Step 5: Solve for x
    x = 1,890,510,400/20,878
  6. Step 6: Final answer
    x = 90,550.36

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.