Home / 11.92-17.88-3.91

Finding the Fourth Proportional to 11.92, 17.88 and 3.91

Calculator

Solution

The fourth proportional to 11.92, 17.88 and 3.91 is: 5.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.92 : 17.88 = 3.91 : x
  2. Step 2: Convert to fraction form
    11.92/17.88 = 3.91/x
  3. Step 3: Cross multiply
    11.92x = 17.88 × 3.91
  4. Step 4: Simplify right side
    11.92x = 69.91
  5. Step 5: Solve for x
    x = 69.91/11.92
  6. Step 6: Final answer
    x = 5.87

Related Problems

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.