Finding the Fourth Proportional to 43.38, 65.04 and 21.99
Calculator
Solution
The fourth proportional to 43.38, 65.04 and 21.99 is: 32.97
Step by Step Solution
- Step 1: Write the proportion equation
43.38 : 65.04 = 21.99 : x - Step 2: Convert to fraction form
43.38/65.04 = 21.99/x - Step 3: Cross multiply
43.38x = 65.04 × 21.99 - Step 4: Simplify right side
43.38x = 1,430.23 - Step 5: Solve for x
x = 1,430.23/43.38 - Step 6: Final answer
x = 32.97
Related Problems
Find fourth proportional to 21.69, 32.52 and 11.00
Half scale
Find fourth proportional to 86.76, 130.08 and 43.98
Double scale
Find fourth proportional to 44.38, 66.54 and 22.99
Similar ratio
Find fourth proportional to 65.07, 97.56 and 32.99
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.