Finding the Third Proportional to 21.19 and 32.81
Calculator
Solution
The third proportional to 21.19 and 32.81 is: 50.82
Step by Step Solution
- Step 1: Write the proportion equation
21.19 : 32.81 = 32.81 : x - Step 2: Convert to fraction form
21.19/32.81 = 32.81/x - Step 3: Cross multiply
21.19x = 32.81 × 32.81 - Step 4: Simplify right side
21.19x = 1,076.66 - Step 5: Solve for x
x = 1,076.66/21.19 - Step 6: Final answer
x = 50.82
Related Problems
Find third proportional to 10.59 and 16.41
Half scale
Find third proportional to 42.38 and 65.63
Double scale
Find third proportional to 23 and 36
Similar ratio
Find third proportional to 31.78 and 49.22
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.