Finding the Fourth Proportional to 20,982,404.56, 28,958,477.64 and 11,816,839.12
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Solution
The fourth proportional to 20,982,404.56, 28,958,477.64 and 11,816,839.12 is: 16,308,791.99
Step by Step Solution
- Step 1: Write the proportion equation
20,982,404.56 : 28,958,477.64 = 11,816,839.12 : x - Step 2: Convert to fraction form
20,982,404.56/28,958,477.64 = 11,816,839.12/x - Step 3: Cross multiply
20,982,404.56x = 28,958,477.64 × 11,816,839.12 - Step 4: Simplify right side
20,982,404.56x = 342,197,671,431,997.25 - Step 5: Solve for x
x = 342,197,671,431,997.25/20,982,404.56 - Step 6: Final answer
x = 16,308,791.99
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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.