Home / 3,921.24-5,414.22-2,431.20

Finding the Fourth Proportional to 3,921.24, 5,414.22 and 2,431.20

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Solution

The fourth proportional to 3,921.24, 5,414.22 and 2,431.20 is: 3,356.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.24 : 5,414.22 = 2,431.20 : x
  2. Step 2: Convert to fraction form
    3,921.24/5,414.22 = 2,431.20/x
  3. Step 3: Cross multiply
    3,921.24x = 5,414.22 × 2,431.20
  4. Step 4: Simplify right side
    3,921.24x = 13,163,051.66
  5. Step 5: Solve for x
    x = 13,163,051.66/3,921.24
  6. Step 6: Final answer
    x = 3,356.86

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1.5x scale

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.