Home / 3,990.63-5,507.01-2,311.92

Finding the Fourth Proportional to 3,990.63, 5,507.01 and 2,311.92

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Solution

The fourth proportional to 3,990.63, 5,507.01 and 2,311.92 is: 3,190.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.63 : 5,507.01 = 2,311.92 : x
  2. Step 2: Convert to fraction form
    3,990.63/5,507.01 = 2,311.92/x
  3. Step 3: Cross multiply
    3,990.63x = 5,507.01 × 2,311.92
  4. Step 4: Simplify right side
    3,990.63x = 12,731,766.56
  5. Step 5: Solve for x
    x = 12,731,766.56/3,990.63
  6. Step 6: Final answer
    x = 3,190.42

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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.