Home / 40.80-56.30-22.38

Finding the Fourth Proportional to 40.80, 56.30 and 22.38

Calculator

Solution

The fourth proportional to 40.80, 56.30 and 22.38 is: 30.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.80 : 56.30 = 22.38 : x
  2. Step 2: Convert to fraction form
    40.80/56.30 = 22.38/x
  3. Step 3: Cross multiply
    40.80x = 56.30 × 22.38
  4. Step 4: Simplify right side
    40.80x = 1,260.05
  5. Step 5: Solve for x
    x = 1,260.05/40.80
  6. Step 6: Final answer
    x = 30.89

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.