Home / 20.14-30.15-11.56

Finding the Fourth Proportional to 20.14, 30.15 and 11.56

Calculator

Solution

The fourth proportional to 20.14, 30.15 and 11.56 is: 17.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.14 : 30.15 = 11.56 : x
  2. Step 2: Convert to fraction form
    20.14/30.15 = 11.56/x
  3. Step 3: Cross multiply
    20.14x = 30.15 × 11.56
  4. Step 4: Simplify right side
    20.14x = 348.53
  5. Step 5: Solve for x
    x = 348.53/20.14
  6. Step 6: Final answer
    x = 17.31

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.