Finding the Fourth Proportional to 21,239,529.72, 29,310,497.10 and 11,581,737.72
Calculator
Solution
The fourth proportional to 21,239,529.72, 29,310,497.10 and 11,581,737.72 is: 15,982,768.65
Step by Step Solution
- Step 1: Write the proportion equation
21,239,529.72 : 29,310,497.10 = 11,581,737.72 : x - Step 2: Convert to fraction form
21,239,529.72/29,310,497.10 = 11,581,737.72/x - Step 3: Cross multiply
21,239,529.72x = 29,310,497.10 × 11,581,737.72 - Step 4: Simplify right side
21,239,529.72x = 339,466,489,855,020.62 - Step 5: Solve for x
x = 339,466,489,855,020.62/21,239,529.72 - Step 6: Final answer
x = 15,982,768.65
Related Problems
Find fourth proportional to 10,619,764.86, 14,655,248.55 and 5,790,868.86
Half scale
Find fourth proportional to 42,479,059.44, 58,620,994.20 and 23,163,475.44
Double scale
Find fourth proportional to 21,239,530.72, 29,310,498.48 and 11,581,738.72
Similar ratio
Find fourth proportional to 31,859,294.58, 43,965,745.65 and 17,372,606.58
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.