Home / 3,921.21-5,406.55-3,122.04

Finding the Fourth Proportional to 3,921.21, 5,406.55 and 3,122.04

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Solution

The fourth proportional to 3,921.21, 5,406.55 and 3,122.04 is: 4,304.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.21 : 5,406.55 = 3,122.04 : x
  2. Step 2: Convert to fraction form
    3,921.21/5,406.55 = 3,122.04/x
  3. Step 3: Cross multiply
    3,921.21x = 5,406.55 × 3,122.04
  4. Step 4: Simplify right side
    3,921.21x = 16,879,477.83
  5. Step 5: Solve for x
    x = 16,879,477.83/3,921.21
  6. Step 6: Final answer
    x = 4,304.66

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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.