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Finding the Third Proportional to 9,918.39 and 21,393.73

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Solution

The third proportional to 9,918.39 and 21,393.73 is: 46,145.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.39 : 21,393.73 = 21,393.73 : x
  2. Step 2: Convert to fraction form
    9,918.39/21,393.73 = 21,393.73/x
  3. Step 3: Cross multiply
    9,918.39x = 21,393.73 × 21,393.73
  4. Step 4: Simplify right side
    9,918.39x = 457,691,661.58
  5. Step 5: Solve for x
    x = 457,691,661.58/9,918.39
  6. Step 6: Final answer
    x = 46,145.78

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.