Finding the Fourth Proportional to 58.08, 87.12 and 21.99
Calculator
Solution
The fourth proportional to 58.08, 87.12 and 21.99 is: 32.99
Step by Step Solution
- Step 1: Write the proportion equation
58.08 : 87.12 = 21.99 : x - Step 2: Convert to fraction form
58.08/87.12 = 21.99/x - Step 3: Cross multiply
58.08x = 87.12 × 21.99 - Step 4: Simplify right side
58.08x = 1,915.77 - Step 5: Solve for x
x = 1,915.77/58.08 - Step 6: Final answer
x = 32.99
Related Problems
Find fourth proportional to 29.04, 43.56 and 11.00
Half scale
Find fourth proportional to 116.16, 174.24 and 43.98
Double scale
Find fourth proportional to 59.08, 88.62 and 22.99
Similar ratio
Find fourth proportional to 87.12, 130.68 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.