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Finding the Third Proportional to 6,390.75 and 13,906

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Solution

The third proportional to 6,390.75 and 13,906 is: 30,258.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.75 : 13,906 = 13,906 : x
  2. Step 2: Convert to fraction form
    6,390.75/13,906 = 13,906/x
  3. Step 3: Cross multiply
    6,390.75x = 13,906 × 13,906
  4. Step 4: Simplify right side
    6,390.75x = 193,376,836
  5. Step 5: Solve for x
    x = 193,376,836/6,390.75
  6. Step 6: Final answer
    x = 30,258.86

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.