Home / 3,620.21-5,431.39-2,080.13

Finding the Fourth Proportional to 3,620.21, 5,431.39 and 2,080.13

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Solution

The fourth proportional to 3,620.21, 5,431.39 and 2,080.13 is: 3,120.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.21 : 5,431.39 = 2,080.13 : x
  2. Step 2: Convert to fraction form
    3,620.21/5,431.39 = 2,080.13/x
  3. Step 3: Cross multiply
    3,620.21x = 5,431.39 × 2,080.13
  4. Step 4: Simplify right side
    3,620.21x = 11,297,964.92
  5. Step 5: Solve for x
    x = 11,297,964.92/3,620.21
  6. Step 6: Final answer
    x = 3,120.81

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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.