Home / 11.20-15.38-10.12

Finding the Fourth Proportional to 11.20, 15.38 and 10.12

Calculator

Solution

The fourth proportional to 11.20, 15.38 and 10.12 is: 13.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.20 : 15.38 = 10.12 : x
  2. Step 2: Convert to fraction form
    11.20/15.38 = 10.12/x
  3. Step 3: Cross multiply
    11.20x = 15.38 × 10.12
  4. Step 4: Simplify right side
    11.20x = 155.65
  5. Step 5: Solve for x
    x = 155.65/11.20
  6. Step 6: Final answer
    x = 13.90

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.