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Finding the Fourth Proportional to 7,286.62, 10,928.64 and 2,091.28

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Solution

The fourth proportional to 7,286.62, 10,928.64 and 2,091.28 is: 3,136.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,286.62 : 10,928.64 = 2,091.28 : x
  2. Step 2: Convert to fraction form
    7,286.62/10,928.64 = 2,091.28/x
  3. Step 3: Cross multiply
    7,286.62x = 10,928.64 × 2,091.28
  4. Step 4: Simplify right side
    7,286.62x = 22,854,846.26
  5. Step 5: Solve for x
    x = 22,854,846.26/7,286.62
  6. Step 6: Final answer
    x = 3,136.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.