Finding the Fourth Proportional to 20,138,642.05, 30,207,963.08 and 12,485,891.65
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Solution
The fourth proportional to 20,138,642.05, 30,207,963.08 and 12,485,891.65 is: 18,728,837.48
Step by Step Solution
- Step 1: Write the proportion equation
20,138,642.05 : 30,207,963.08 = 12,485,891.65 : x - Step 2: Convert to fraction form
20,138,642.05/30,207,963.08 = 12,485,891.65/x - Step 3: Cross multiply
20,138,642.05x = 30,207,963.08 × 12,485,891.65 - Step 4: Simplify right side
20,138,642.05x = 377,173,353,984,080.25 - Step 5: Solve for x
x = 377,173,353,984,080.25/20,138,642.05 - Step 6: Final answer
x = 18,728,837.48
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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.