Finding the Fourth Proportional to 12,128,524.80, 18,192,787.20 and 8,709,587.70
Calculator
Solution
The fourth proportional to 12,128,524.80, 18,192,787.20 and 8,709,587.70 is: 13,064,381.55
Step by Step Solution
- Step 1: Write the proportion equation
12,128,524.80 : 18,192,787.20 = 8,709,587.70 : x - Step 2: Convert to fraction form
12,128,524.80/18,192,787.20 = 8,709,587.70/x - Step 3: Cross multiply
12,128,524.80x = 18,192,787.20 × 8,709,587.70 - Step 4: Simplify right side
12,128,524.80x = 158,451,675,625,837.41 - Step 5: Solve for x
x = 158,451,675,625,837.41/12,128,524.80 - Step 6: Final answer
x = 13,064,381.55
Related Problems
Find fourth proportional to 6,064,262.40, 9,096,393.60 and 4,354,793.85
Half scale
Find fourth proportional to 24,257,049.60, 36,385,574.40 and 17,419,175.40
Double scale
Find fourth proportional to 12,128,525.80, 18,192,788.70 and 8,709,588.70
Similar ratio
Find fourth proportional to 18,192,787.20, 27,289,180.80 and 13,064,381.55
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.