Finding the Fourth Proportional to 18,090,717.40, 27,127,781.70 and 7,988,138.20
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Solution
The fourth proportional to 18,090,717.40, 27,127,781.70 and 7,988,138.20 is: 11,978,544.82
Step by Step Solution
- Step 1: Write the proportion equation
18,090,717.40 : 27,127,781.70 = 7,988,138.20 : x - Step 2: Convert to fraction form
18,090,717.40/27,127,781.70 = 7,988,138.20/x - Step 3: Cross multiply
18,090,717.40x = 27,127,781.70 × 7,988,138.20 - Step 4: Simplify right side
18,090,717.40x = 216,700,469,279,030.94 - Step 5: Solve for x
x = 216,700,469,279,030.94/18,090,717.40 - Step 6: Final answer
x = 11,978,544.82
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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.