Home / 3,917.85-5,405.56-2,521.41

Finding the Fourth Proportional to 3,917.85, 5,405.56 and 2,521.41

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Solution

The fourth proportional to 3,917.85, 5,405.56 and 2,521.41 is: 3,478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.85 : 5,405.56 = 2,521.41 : x
  2. Step 2: Convert to fraction form
    3,917.85/5,405.56 = 2,521.41/x
  3. Step 3: Cross multiply
    3,917.85x = 5,405.56 × 2,521.41
  4. Step 4: Simplify right side
    3,917.85x = 13,629,620.43
  5. Step 5: Solve for x
    x = 13,629,620.43/3,917.85
  6. Step 6: Final answer
    x = 3,478.85

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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.