Home / 7,811.62-11,716.81-3,131.44

Finding the Fourth Proportional to 7,811.62, 11,716.81 and 3,131.44

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Solution

The fourth proportional to 7,811.62, 11,716.81 and 3,131.44 is: 4,696.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.62 : 11,716.81 = 3,131.44 : x
  2. Step 2: Convert to fraction form
    7,811.62/11,716.81 = 3,131.44/x
  3. Step 3: Cross multiply
    7,811.62x = 11,716.81 × 3,131.44
  4. Step 4: Simplify right side
    7,811.62x = 36,690,487.51
  5. Step 5: Solve for x
    x = 36,690,487.51/7,811.62
  6. Step 6: Final answer
    x = 4,696.91

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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.