Finding the Fourth Proportional to 15,311,379.12, 21,129,691.64 and 8,435,861.19
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Solution
The fourth proportional to 15,311,379.12, 21,129,691.64 and 8,435,861.19 is: 11,641,482.08
Step by Step Solution
- Step 1: Write the proportion equation
15,311,379.12 : 21,129,691.64 = 8,435,861.19 : x - Step 2: Convert to fraction form
15,311,379.12/21,129,691.64 = 8,435,861.19/x - Step 3: Cross multiply
15,311,379.12x = 21,129,691.64 × 8,435,861.19 - Step 4: Simplify right side
15,311,379.12x = 178,247,145,620,364.16 - Step 5: Solve for x
x = 178,247,145,620,364.16/15,311,379.12 - Step 6: Final answer
x = 11,641,482.08
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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.