Finding the Fourth Proportional to 18,397,872.70, 27,596,809.05 and 12,658,309.90
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Solution
The fourth proportional to 18,397,872.70, 27,596,809.05 and 12,658,309.90 is: 18,987,464.85
Step by Step Solution
- Step 1: Write the proportion equation
18,397,872.70 : 27,596,809.05 = 12,658,309.90 : x - Step 2: Convert to fraction form
18,397,872.70/27,596,809.05 = 12,658,309.90/x - Step 3: Cross multiply
18,397,872.70x = 27,596,809.05 × 12,658,309.90 - Step 4: Simplify right side
18,397,872.70x = 349,328,961,206,024.62 - Step 5: Solve for x
x = 349,328,961,206,024.62/18,397,872.70 - Step 6: Final answer
x = 18,987,464.85
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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.