Finding the Fourth Proportional to 39,318,128.10, 54,259,268.67 and 21,915,576.81
Calculator
Solution
The fourth proportional to 39,318,128.10, 54,259,268.67 and 21,915,576.81 is: 30,243,636.40
Step by Step Solution
- Step 1: Write the proportion equation
39,318,128.10 : 54,259,268.67 = 21,915,576.81 : x - Step 2: Convert to fraction form
39,318,128.10/54,259,268.67 = 21,915,576.81/x - Step 3: Cross multiply
39,318,128.10x = 54,259,268.67 × 21,915,576.81 - Step 4: Simplify right side
39,318,128.10x = 1,189,123,170,191,811.50 - Step 5: Solve for x
x = 1,189,123,170,191,811.50/39,318,128.10 - Step 6: Final answer
x = 30,243,636.40
Related Problems
Find fourth proportional to 19,659,064.05, 27,129,634.34 and 10,957,788.41
Half scale
Find fourth proportional to 78,636,256.20, 108,518,537.34 and 43,831,153.62
Double scale
Find fourth proportional to 39,318,129.10, 54,259,270.05 and 21,915,577.81
Similar ratio
Find fourth proportional to 58,977,192.15, 81,388,903.01 and 32,873,365.22
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.