Finding the Fourth Proportional to 18,461,292.80, 27,691,939.20 and 12,414,675.20
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Solution
The fourth proportional to 18,461,292.80, 27,691,939.20 and 12,414,675.20 is: 18,622,012.80
Step by Step Solution
- Step 1: Write the proportion equation
18,461,292.80 : 27,691,939.20 = 12,414,675.20 : x - Step 2: Convert to fraction form
18,461,292.80/27,691,939.20 = 12,414,675.20/x - Step 3: Cross multiply
18,461,292.80x = 27,691,939.20 × 12,414,675.20 - Step 4: Simplify right side
18,461,292.80x = 343,786,430,826,147.81 - Step 5: Solve for x
x = 343,786,430,826,147.81/18,461,292.80 - Step 6: Final answer
x = 18,622,012.80
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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.