Finding the Fourth Proportional to 19,200, 28,800 and 4,608
Calculator
Solution
The fourth proportional to 19,200, 28,800 and 4,608 is: 6,912
Step by Step Solution
- Step 1: Write the proportion equation
19,200 : 28,800 = 4,608 : x - Step 2: Convert to fraction form
19,200/28,800 = 4,608/x - Step 3: Cross multiply
19,200x = 28,800 × 4,608 - Step 4: Simplify right side
19,200x = 132,710,400 - Step 5: Solve for x
x = 132,710,400/19,200 - Step 6: Final answer
x = 6,912
Related Problems
Find fourth proportional to 9,600, 14,400 and 2,304
Half scale
Find fourth proportional to 38,400, 57,600 and 9,216
Double scale
Find fourth proportional to 19,201, 28,801.50 and 4,609
Similar ratio
Find fourth proportional to 28,800, 43,200 and 6,912
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.