Finding the Fourth Proportional to 37.98, 57.02 and 19.99
Calculator
Solution
The fourth proportional to 37.98, 57.02 and 19.99 is: 30.01
Step by Step Solution
- Step 1: Write the proportion equation
37.98 : 57.02 = 19.99 : x - Step 2: Convert to fraction form
37.98/57.02 = 19.99/x - Step 3: Cross multiply
37.98x = 57.02 × 19.99 - Step 4: Simplify right side
37.98x = 1,139.83 - Step 5: Solve for x
x = 1,139.83/37.98 - Step 6: Final answer
x = 30.01
Related Problems
Find fourth proportional to 18.99, 28.51 and 10.00
Half scale
Find fourth proportional to 75.96, 114.04 and 39.98
Double scale
Find fourth proportional to 38.98, 58.52 and 20.99
Similar ratio
Find fourth proportional to 56.97, 85.53 and 29.99
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.