Home / 15.88-21.91-15.33

Finding the Fourth Proportional to 15.88, 21.91 and 15.33

Calculator

Solution

The fourth proportional to 15.88, 21.91 and 15.33 is: 21.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.88 : 21.91 = 15.33 : x
  2. Step 2: Convert to fraction form
    15.88/21.91 = 15.33/x
  3. Step 3: Cross multiply
    15.88x = 21.91 × 15.33
  4. Step 4: Simplify right side
    15.88x = 335.98
  5. Step 5: Solve for x
    x = 335.98/15.88
  6. Step 6: Final answer
    x = 21.16

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.