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Finding the Fourth Proportional to 7,902.25, 11,855.10 and 2,971.88

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Solution

The fourth proportional to 7,902.25, 11,855.10 and 2,971.88 is: 4,458.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,902.25 : 11,855.10 = 2,971.88 : x
  2. Step 2: Convert to fraction form
    7,902.25/11,855.10 = 2,971.88/x
  3. Step 3: Cross multiply
    7,902.25x = 11,855.10 × 2,971.88
  4. Step 4: Simplify right side
    7,902.25x = 35,231,919.73
  5. Step 5: Solve for x
    x = 35,231,919.73/7,902.25
  6. Step 6: Final answer
    x = 4,458.47

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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.