Home / 56.97-85.41-20.40

Finding the Fourth Proportional to 56.97, 85.41 and 20.40

Calculator

Solution

The fourth proportional to 56.97, 85.41 and 20.40 is: 30.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.97 : 85.41 = 20.40 : x
  2. Step 2: Convert to fraction form
    56.97/85.41 = 20.40/x
  3. Step 3: Cross multiply
    56.97x = 85.41 × 20.40
  4. Step 4: Simplify right side
    56.97x = 1,742.36
  5. Step 5: Solve for x
    x = 1,742.36/56.97
  6. Step 6: Final answer
    x = 30.58

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.