Finding the Fourth Proportional to 21,438,916.85, 29,585,892.09 and 11,649,361.21
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Solution
The fourth proportional to 21,438,916.85, 29,585,892.09 and 11,649,361.21 is: 16,076,219.99
Step by Step Solution
- Step 1: Write the proportion equation
21,438,916.85 : 29,585,892.09 = 11,649,361.21 : x - Step 2: Convert to fraction form
21,438,916.85/29,585,892.09 = 11,649,361.21/x - Step 3: Cross multiply
21,438,916.85x = 29,585,892.09 × 11,649,361.21 - Step 4: Simplify right side
21,438,916.85x = 344,656,743,646,212.19 - Step 5: Solve for x
x = 344,656,743,646,212.19/21,438,916.85 - Step 6: Final answer
x = 16,076,219.99
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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.