Home / 15.72-21.56-14.16

Finding the Fourth Proportional to 15.72, 21.56 and 14.16

Calculator

Solution

The fourth proportional to 15.72, 21.56 and 14.16 is: 19.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.72 : 21.56 = 14.16 : x
  2. Step 2: Convert to fraction form
    15.72/21.56 = 14.16/x
  3. Step 3: Cross multiply
    15.72x = 21.56 × 14.16
  4. Step 4: Simplify right side
    15.72x = 305.29
  5. Step 5: Solve for x
    x = 305.29/15.72
  6. Step 6: Final answer
    x = 19.42

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.