Home / 3,914.42-5,401.91-2,121.90

Finding the Fourth Proportional to 3,914.42, 5,401.91 and 2,121.90

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Solution

The fourth proportional to 3,914.42, 5,401.91 and 2,121.90 is: 2,928.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,914.42 : 5,401.91 = 2,121.90 : x
  2. Step 2: Convert to fraction form
    3,914.42/5,401.91 = 2,121.90/x
  3. Step 3: Cross multiply
    3,914.42x = 5,401.91 × 2,121.90
  4. Step 4: Simplify right side
    3,914.42x = 11,462,302.22
  5. Step 5: Solve for x
    x = 11,462,302.22/3,914.42
  6. Step 6: Final answer
    x = 2,928.23

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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.