Finding the Fourth Proportional to 18,702,935.40, 28,007,163.90 and 12,278,404.20
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Solution
The fourth proportional to 18,702,935.40, 28,007,163.90 and 12,278,404.20 is: 18,386,593.95
Step by Step Solution
- Step 1: Write the proportion equation
18,702,935.40 : 28,007,163.90 = 12,278,404.20 : x - Step 2: Convert to fraction form
18,702,935.40/28,007,163.90 = 12,278,404.20/x - Step 3: Cross multiply
18,702,935.40x = 28,007,163.90 × 12,278,404.20 - Step 4: Simplify right side
18,702,935.40x = 343,883,278,859,848.31 - Step 5: Solve for x
x = 343,883,278,859,848.31/18,702,935.40 - Step 6: Final answer
x = 18,386,593.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.