Finding the Fourth Proportional to 38.86, 53.59 and 27.99
Calculator
Solution
The fourth proportional to 38.86, 53.59 and 27.99 is: 38.60
Step by Step Solution
- Step 1: Write the proportion equation
38.86 : 53.59 = 27.99 : x - Step 2: Convert to fraction form
38.86/53.59 = 27.99/x - Step 3: Cross multiply
38.86x = 53.59 × 27.99 - Step 4: Simplify right side
38.86x = 1,499.98 - Step 5: Solve for x
x = 1,499.98/38.86 - Step 6: Final answer
x = 38.60
Related Problems
Find fourth proportional to 19.43, 26.80 and 14.00
Half scale
Find fourth proportional to 77.72, 107.18 and 55.98
Double scale
Find fourth proportional to 39.86, 54.97 and 28.99
Similar ratio
Find fourth proportional to 58.29, 80.39 and 41.99
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.