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Finding the Fourth Proportional to 7,843.41, 11,767.40 and 3,161

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Solution

The fourth proportional to 7,843.41, 11,767.40 and 3,161 is: 4,742.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,843.41 : 11,767.40 = 3,161 : x
  2. Step 2: Convert to fraction form
    7,843.41/11,767.40 = 3,161/x
  3. Step 3: Cross multiply
    7,843.41x = 11,767.40 × 3,161
  4. Step 4: Simplify right side
    7,843.41x = 37,196,751.40
  5. Step 5: Solve for x
    x = 37,196,751.40/7,843.41
  6. Step 6: Final answer
    x = 4,742.42

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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.