Finding the Fourth Proportional to 20,821,439.44, 28,729,503.12 and 13,081,997.80
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Solution
The fourth proportional to 20,821,439.44, 28,729,503.12 and 13,081,997.80 is: 18,050,591.44
Step by Step Solution
- Step 1: Write the proportion equation
20,821,439.44 : 28,729,503.12 = 13,081,997.80 : x - Step 2: Convert to fraction form
20,821,439.44/28,729,503.12 = 13,081,997.80/x - Step 3: Cross multiply
20,821,439.44x = 28,729,503.12 × 13,081,997.80 - Step 4: Simplify right side
20,821,439.44x = 375,839,296,610,933.19 - Step 5: Solve for x
x = 375,839,296,610,933.19/20,821,439.44 - Step 6: Final answer
x = 18,050,591.44
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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.