Finding the Fourth Proportional to 6.55, 9.81 and 4
Calculator
Solution
The fourth proportional to 6.55, 9.81 and 4 is: 5.99
Step by Step Solution
- Step 1: Write the proportion equation
6.55 : 9.81 = 4 : x - Step 2: Convert to fraction form
6.55/9.81 = 4/x - Step 3: Cross multiply
6.55x = 9.81 × 4 - Step 4: Simplify right side
6.55x = 39.22 - Step 5: Solve for x
x = 39.22/6.55 - Step 6: Final answer
x = 5.99
Related Problems
Find fourth proportional to 3.28, 4.90 and 2
Half scale
Find fourth proportional to 13.10, 19.61 and 8
Double scale
Find fourth proportional to 7.55, 11.30 and 5
Similar ratio
Find fourth proportional to 9.83, 14.71 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.