Home / 21.05-29.05-11.84

Finding the Fourth Proportional to 21.05, 29.05 and 11.84

Calculator

Solution

The fourth proportional to 21.05, 29.05 and 11.84 is: 16.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.05 : 29.05 = 11.84 : x
  2. Step 2: Convert to fraction form
    21.05/29.05 = 11.84/x
  3. Step 3: Cross multiply
    21.05x = 29.05 × 11.84
  4. Step 4: Simplify right side
    21.05x = 343.95
  5. Step 5: Solve for x
    x = 343.95/21.05
  6. Step 6: Final answer
    x = 16.34

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.