Finding the Fourth Proportional to 18,144,821.20, 27,217,231.80 and 13,665,845.20
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Solution
The fourth proportional to 18,144,821.20, 27,217,231.80 and 13,665,845.20 is: 20,498,767.80
Step by Step Solution
- Step 1: Write the proportion equation
18,144,821.20 : 27,217,231.80 = 13,665,845.20 : x - Step 2: Convert to fraction form
18,144,821.20/27,217,231.80 = 13,665,845.20/x - Step 3: Cross multiply
18,144,821.20x = 27,217,231.80 × 13,665,845.20 - Step 4: Simplify right side
18,144,821.20x = 371,946,476,551,317.38 - Step 5: Solve for x
x = 371,946,476,551,317.38/18,144,821.20 - Step 6: Final answer
x = 20,498,767.80
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1.5x scale
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.