Finding the Fourth Proportional to 40.08, 60.12 and 28.08
Calculator
Solution
The fourth proportional to 40.08, 60.12 and 28.08 is: 42.12
Step by Step Solution
- Step 1: Write the proportion equation
40.08 : 60.12 = 28.08 : x - Step 2: Convert to fraction form
40.08/60.12 = 28.08/x - Step 3: Cross multiply
40.08x = 60.12 × 28.08 - Step 4: Simplify right side
40.08x = 1,688.17 - Step 5: Solve for x
x = 1,688.17/40.08 - Step 6: Final answer
x = 42.12
Related Problems
Find fourth proportional to 20.04, 30.06 and 14.04
Half scale
Find fourth proportional to 80.16, 120.24 and 56.16
Double scale
Find fourth proportional to 41.08, 61.62 and 29.08
Similar ratio
Find fourth proportional to 60.12, 90.18 and 42.12
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.