Home / 3,921.20-5,880.12-1,322.96

Finding the Fourth Proportional to 3,921.20, 5,880.12 and 1,322.96

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Solution

The fourth proportional to 3,921.20, 5,880.12 and 1,322.96 is: 1,983.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.20 : 5,880.12 = 1,322.96 : x
  2. Step 2: Convert to fraction form
    3,921.20/5,880.12 = 1,322.96/x
  3. Step 3: Cross multiply
    3,921.20x = 5,880.12 × 1,322.96
  4. Step 4: Simplify right side
    3,921.20x = 7,779,163.56
  5. Step 5: Solve for x
    x = 7,779,163.56/3,921.20
  6. Step 6: Final answer
    x = 1,983.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.