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Finding the Third Proportional to 9,418.78 and 20,690.44

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Solution

The third proportional to 9,418.78 and 20,690.44 is: 45,451.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,418.78 : 20,690.44 = 20,690.44 : x
  2. Step 2: Convert to fraction form
    9,418.78/20,690.44 = 20,690.44/x
  3. Step 3: Cross multiply
    9,418.78x = 20,690.44 × 20,690.44
  4. Step 4: Simplify right side
    9,418.78x = 428,094,203.94
  5. Step 5: Solve for x
    x = 428,094,203.94/9,418.78
  6. Step 6: Final answer
    x = 45,451.13

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.