Home / 26.86-40.29-19.78

Finding the Fourth Proportional to 26.86, 40.29 and 19.78

Calculator

Solution

The fourth proportional to 26.86, 40.29 and 19.78 is: 29.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.86 : 40.29 = 19.78 : x
  2. Step 2: Convert to fraction form
    26.86/40.29 = 19.78/x
  3. Step 3: Cross multiply
    26.86x = 40.29 × 19.78
  4. Step 4: Simplify right side
    26.86x = 796.94
  5. Step 5: Solve for x
    x = 796.94/26.86
  6. Step 6: Final answer
    x = 29.67

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.