Home / 20.58-30.86-9.16

Finding the Fourth Proportional to 20.58, 30.86 and 9.16

Calculator

Solution

The fourth proportional to 20.58, 30.86 and 9.16 is: 13.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.58 : 30.86 = 9.16 : x
  2. Step 2: Convert to fraction form
    20.58/30.86 = 9.16/x
  3. Step 3: Cross multiply
    20.58x = 30.86 × 9.16
  4. Step 4: Simplify right side
    20.58x = 282.68
  5. Step 5: Solve for x
    x = 282.68/20.58
  6. Step 6: Final answer
    x = 13.74

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.