Finding the Fourth Proportional to 18,793,811.80, 28,190,717.70 and 12,821,843.80
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Solution
The fourth proportional to 18,793,811.80, 28,190,717.70 and 12,821,843.80 is: 19,232,765.70
Step by Step Solution
- Step 1: Write the proportion equation
18,793,811.80 : 28,190,717.70 = 12,821,843.80 : x - Step 2: Convert to fraction form
18,793,811.80/28,190,717.70 = 12,821,843.80/x - Step 3: Cross multiply
18,793,811.80x = 28,190,717.70 × 12,821,843.80 - Step 4: Simplify right side
18,793,811.80x = 361,456,978,959,295.25 - Step 5: Solve for x
x = 361,456,978,959,295.25/18,793,811.80 - Step 6: Final answer
x = 19,232,765.70
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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.