Home / 48.18-72.23-21.11

Finding the Fourth Proportional to 48.18, 72.23 and 21.11

Calculator

Solution

The fourth proportional to 48.18, 72.23 and 21.11 is: 31.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.18 : 72.23 = 21.11 : x
  2. Step 2: Convert to fraction form
    48.18/72.23 = 21.11/x
  3. Step 3: Cross multiply
    48.18x = 72.23 × 21.11
  4. Step 4: Simplify right side
    48.18x = 1,524.31
  5. Step 5: Solve for x
    x = 1,524.31/48.18
  6. Step 6: Final answer
    x = 31.64

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.