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Finding the Third Proportional to 3,111.75 and 6,540.75

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Solution

The third proportional to 3,111.75 and 6,540.75 is: 13,748.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.75 : 6,540.75 = 6,540.75 : x
  2. Step 2: Convert to fraction form
    3,111.75/6,540.75 = 6,540.75/x
  3. Step 3: Cross multiply
    3,111.75x = 6,540.75 × 6,540.75
  4. Step 4: Simplify right side
    3,111.75x = 42,781,410.56
  5. Step 5: Solve for x
    x = 42,781,410.56/3,111.75
  6. Step 6: Final answer
    x = 13,748.34

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.