Home / 5.11-7.66-4

Finding the Fourth Proportional to 5.11, 7.66 and 4

Calculator

Solution

The fourth proportional to 5.11, 7.66 and 4 is: 6.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.11 : 7.66 = 4 : x
  2. Step 2: Convert to fraction form
    5.11/7.66 = 4/x
  3. Step 3: Cross multiply
    5.11x = 7.66 × 4
  4. Step 4: Simplify right side
    5.11x = 30.64
  5. Step 5: Solve for x
    x = 30.64/5.11
  6. Step 6: Final answer
    x = 6.00

Related Problems

Find fourth proportional to 2.56, 3.83 and 2
Half scale
Find fourth proportional to 10.22, 15.32 and 8
Double scale
Find fourth proportional to 6.11, 9.16 and 5
Similar ratio
Find fourth proportional to 7.67, 11.49 and 6
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.