Home / 3,900.32-5,382.44-2,131.93

Finding the Fourth Proportional to 3,900.32, 5,382.44 and 2,131.93

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Solution

The fourth proportional to 3,900.32, 5,382.44 and 2,131.93 is: 2,942.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.32 : 5,382.44 = 2,131.93 : x
  2. Step 2: Convert to fraction form
    3,900.32/5,382.44 = 2,131.93/x
  3. Step 3: Cross multiply
    3,900.32x = 5,382.44 × 2,131.93
  4. Step 4: Simplify right side
    3,900.32x = 11,474,977.18
  5. Step 5: Solve for x
    x = 11,474,977.18/3,900.32
  6. Step 6: Final answer
    x = 2,942.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.