Home / 3,919.92-5,409.76-2,591.32

Finding the Fourth Proportional to 3,919.92, 5,409.76 and 2,591.32

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Solution

The fourth proportional to 3,919.92, 5,409.76 and 2,591.32 is: 3,576.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.92 : 5,409.76 = 2,591.32 : x
  2. Step 2: Convert to fraction form
    3,919.92/5,409.76 = 2,591.32/x
  3. Step 3: Cross multiply
    3,919.92x = 5,409.76 × 2,591.32
  4. Step 4: Simplify right side
    3,919.92x = 14,018,419.28
  5. Step 5: Solve for x
    x = 14,018,419.28/3,919.92
  6. Step 6: Final answer
    x = 3,576.20

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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.