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Finding the Third Proportional to 3,960 and 7,578

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Solution

The third proportional to 3,960 and 7,578 is: 14,501.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960 : 7,578 = 7,578 : x
  2. Step 2: Convert to fraction form
    3,960/7,578 = 7,578/x
  3. Step 3: Cross multiply
    3,960x = 7,578 × 7,578
  4. Step 4: Simplify right side
    3,960x = 57,426,084
  5. Step 5: Solve for x
    x = 57,426,084/3,960
  6. Step 6: Final answer
    x = 14,501.54

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.