Home / 48.16-72.24-21.08

Finding the Fourth Proportional to 48.16, 72.24 and 21.08

Calculator

Solution

The fourth proportional to 48.16, 72.24 and 21.08 is: 31.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.16 : 72.24 = 21.08 : x
  2. Step 2: Convert to fraction form
    48.16/72.24 = 21.08/x
  3. Step 3: Cross multiply
    48.16x = 72.24 × 21.08
  4. Step 4: Simplify right side
    48.16x = 1,522.46
  5. Step 5: Solve for x
    x = 1,522.46/48.16
  6. Step 6: Final answer
    x = 31.61

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.