Finding the Fourth Proportional to 20,951,518.05, 28,915,611.66 and 12,691,338.12
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Solution
The fourth proportional to 20,951,518.05, 28,915,611.66 and 12,691,338.12 is: 17,515,571.12
Step by Step Solution
- Step 1: Write the proportion equation
20,951,518.05 : 28,915,611.66 = 12,691,338.12 : x - Step 2: Convert to fraction form
20,951,518.05/28,915,611.66 = 12,691,338.12/x - Step 3: Cross multiply
20,951,518.05x = 28,915,611.66 × 12,691,338.12 - Step 4: Simplify right side
20,951,518.05x = 366,977,804,523,674.44 - Step 5: Solve for x
x = 366,977,804,523,674.44/20,951,518.05 - Step 6: Final answer
x = 17,515,571.12
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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.