Finding the Fourth Proportional to 18,661,663.40, 27,992,495.10 and 7,891,125.80
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Solution
The fourth proportional to 18,661,663.40, 27,992,495.10 and 7,891,125.80 is: 11,836,688.70
Step by Step Solution
- Step 1: Write the proportion equation
18,661,663.40 : 27,992,495.10 = 7,891,125.80 : x - Step 2: Convert to fraction form
18,661,663.40/27,992,495.10 = 7,891,125.80/x - Step 3: Cross multiply
18,661,663.40x = 27,992,495.10 × 7,891,125.80 - Step 4: Simplify right side
18,661,663.40x = 220,892,300,289,983.59 - Step 5: Solve for x
x = 220,892,300,289,983.59/18,661,663.40 - Step 6: Final answer
x = 11,836,688.70
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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.