Home / 28.72-43-20.13

Finding the Fourth Proportional to 28.72, 43 and 20.13

Calculator

Solution

The fourth proportional to 28.72, 43 and 20.13 is: 30.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.72 : 43 = 20.13 : x
  2. Step 2: Convert to fraction form
    28.72/43 = 20.13/x
  3. Step 3: Cross multiply
    28.72x = 43 × 20.13
  4. Step 4: Simplify right side
    28.72x = 865.59
  5. Step 5: Solve for x
    x = 865.59/28.72
  6. Step 6: Final answer
    x = 30.14

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.