Home / 7.85-10.83-6

Finding the Fourth Proportional to 7.85, 10.83 and 6

Calculator

Solution

The fourth proportional to 7.85, 10.83 and 6 is: 8.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.85 : 10.83 = 6 : x
  2. Step 2: Convert to fraction form
    7.85/10.83 = 6/x
  3. Step 3: Cross multiply
    7.85x = 10.83 × 6
  4. Step 4: Simplify right side
    7.85x = 64.98
  5. Step 5: Solve for x
    x = 64.98/7.85
  6. Step 6: Final answer
    x = 8.28

Related Problems

Find fourth proportional to 3.92, 5.42 and 3
Half scale
Find fourth proportional to 15.69, 21.66 and 12
Double scale
Find fourth proportional to 8.85, 12.21 and 7
Similar ratio
Find fourth proportional to 11.77, 16.25 and 9
1.5x scale

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.