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Finding the Third Proportional to 3,960 and 7,803

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Solution

The third proportional to 3,960 and 7,803 is: 15,375.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960 : 7,803 = 7,803 : x
  2. Step 2: Convert to fraction form
    3,960/7,803 = 7,803/x
  3. Step 3: Cross multiply
    3,960x = 7,803 × 7,803
  4. Step 4: Simplify right side
    3,960x = 60,886,809
  5. Step 5: Solve for x
    x = 60,886,809/3,960
  6. Step 6: Final answer
    x = 15,375.46

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.