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Finding the Fourth Proportional to 6,940.64, 9,578.08 and 3,956.48

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Solution

The fourth proportional to 6,940.64, 9,578.08 and 3,956.48 is: 5,459.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,940.64 : 9,578.08 = 3,956.48 : x
  2. Step 2: Convert to fraction form
    6,940.64/9,578.08 = 3,956.48/x
  3. Step 3: Cross multiply
    6,940.64x = 9,578.08 × 3,956.48
  4. Step 4: Simplify right side
    6,940.64x = 37,895,481.96
  5. Step 5: Solve for x
    x = 37,895,481.96/6,940.64
  6. Step 6: Final answer
    x = 5,459.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.