Home / 40.40-55.75-23.15

Finding the Fourth Proportional to 40.40, 55.75 and 23.15

Calculator

Solution

The fourth proportional to 40.40, 55.75 and 23.15 is: 31.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.40 : 55.75 = 23.15 : x
  2. Step 2: Convert to fraction form
    40.40/55.75 = 23.15/x
  3. Step 3: Cross multiply
    40.40x = 55.75 × 23.15
  4. Step 4: Simplify right side
    40.40x = 1,290.22
  5. Step 5: Solve for x
    x = 1,290.22/40.40
  6. Step 6: Final answer
    x = 31.94

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.