Finding the Fourth Proportional to 12,128,578.40, 18,193,159.20 and 3,609,192.80
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Solution
The fourth proportional to 12,128,578.40, 18,193,159.20 and 3,609,192.80 is: 5,413,875.97
Step by Step Solution
- Step 1: Write the proportion equation
12,128,578.40 : 18,193,159.20 = 3,609,192.80 : x - Step 2: Convert to fraction form
12,128,578.40/18,193,159.20 = 3,609,192.80/x - Step 3: Cross multiply
12,128,578.40x = 18,193,159.20 × 3,609,192.80 - Step 4: Simplify right side
12,128,578.40x = 65,662,619,193,893.76 - Step 5: Solve for x
x = 65,662,619,193,893.76/12,128,578.40 - Step 6: Final answer
x = 5,413,875.97
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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.