Home / 4,139.28-6,198.84-3,990.24

Finding the Fourth Proportional to 4,139.28, 6,198.84 and 3,990.24

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Solution

The fourth proportional to 4,139.28, 6,198.84 and 3,990.24 is: 5,975.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,139.28 : 6,198.84 = 3,990.24 : x
  2. Step 2: Convert to fraction form
    4,139.28/6,198.84 = 3,990.24/x
  3. Step 3: Cross multiply
    4,139.28x = 6,198.84 × 3,990.24
  4. Step 4: Simplify right side
    4,139.28x = 24,734,859.32
  5. Step 5: Solve for x
    x = 24,734,859.32/4,139.28
  6. Step 6: Final answer
    x = 5,975.64

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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.