Finding the Fourth Proportional to 26.24, 39.35 and 8.21
Calculator
Solution
The fourth proportional to 26.24, 39.35 and 8.21 is: 12.32
Step by Step Solution
- Step 1: Write the proportion equation
26.24 : 39.35 = 8.21 : x - Step 2: Convert to fraction form
26.24/39.35 = 8.21/x - Step 3: Cross multiply
26.24x = 39.35 × 8.21 - Step 4: Simplify right side
26.24x = 323.18 - Step 5: Solve for x
x = 323.18/26.24 - Step 6: Final answer
x = 12.32
Related Problems
Find fourth proportional to 13.12, 19.68 and 4.11
Half scale
Find fourth proportional to 52.49, 78.71 and 16.43
Double scale
Find fourth proportional to 27.24, 40.85 and 9.21
Similar ratio
Find fourth proportional to 39.36, 59.03 and 12.32
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.