Home / 6.85-10.28-6

Finding the Fourth Proportional to 6.85, 10.28 and 6

Calculator

Solution

The fourth proportional to 6.85, 10.28 and 6 is: 9.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.85 : 10.28 = 6 : x
  2. Step 2: Convert to fraction form
    6.85/10.28 = 6/x
  3. Step 3: Cross multiply
    6.85x = 10.28 × 6
  4. Step 4: Simplify right side
    6.85x = 61.65
  5. Step 5: Solve for x
    x = 61.65/6.85
  6. Step 6: Final answer
    x = 9.01

Related Problems

Find fourth proportional to 3.42, 5.14 and 3
Half scale
Find fourth proportional to 13.69, 20.55 and 12
Double scale
Find fourth proportional to 7.85, 11.78 and 7
Similar ratio
Find fourth proportional to 10.27, 15.41 and 9
1.5x scale

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.