Finding the Fourth Proportional to 5.81, 8.71 and 4
Calculator
Solution
The fourth proportional to 5.81, 8.71 and 4 is: 5.99
Step by Step Solution
- Step 1: Write the proportion equation
5.81 : 8.71 = 4 : x - Step 2: Convert to fraction form
5.81/8.71 = 4/x - Step 3: Cross multiply
5.81x = 8.71 × 4 - Step 4: Simplify right side
5.81x = 34.82 - Step 5: Solve for x
x = 34.82/5.81 - Step 6: Final answer
x = 5.99
Related Problems
Find fourth proportional to 2.91, 4.35 and 2
Half scale
Find fourth proportional to 11.62, 17.41 and 8
Double scale
Find fourth proportional to 6.81, 10.20 and 5
Similar ratio
Find fourth proportional to 8.72, 13.06 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.