Finding the Fourth Proportional to 28,512,930.80, 42,771,034.60 and 8,321,289.20
Calculator
Solution
The fourth proportional to 28,512,930.80, 42,771,034.60 and 8,321,289.20 is: 12,482,411.95
Step by Step Solution
- Step 1: Write the proportion equation
28,512,930.80 : 42,771,034.60 = 8,321,289.20 : x - Step 2: Convert to fraction form
28,512,930.80/42,771,034.60 = 8,321,289.20/x - Step 3: Cross multiply
28,512,930.80x = 42,771,034.60 × 8,321,289.20 - Step 4: Simplify right side
28,512,930.80x = 355,910,148,289,806.31 - Step 5: Solve for x
x = 355,910,148,289,806.31/28,512,930.80 - Step 6: Final answer
x = 12,482,411.95
Related Problems
Find fourth proportional to 14,256,465.40, 21,385,517.30 and 4,160,644.60
Half scale
Find fourth proportional to 57,025,861.60, 85,542,069.20 and 16,642,578.40
Double scale
Find fourth proportional to 28,512,931.80, 42,771,036.10 and 8,321,290.20
Similar ratio
Find fourth proportional to 42,769,396.20, 64,156,551.90 and 12,481,933.80
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.