Finding the Fourth Proportional to 7,158,805.62, 9,879,153.38 and 3,939,541.62
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Solution
The fourth proportional to 7,158,805.62, 9,879,153.38 and 3,939,541.62 is: 5,436,568.33
Step by Step Solution
- Step 1: Write the proportion equation
7,158,805.62 : 9,879,153.38 = 3,939,541.62 : x - Step 2: Convert to fraction form
7,158,805.62/9,879,153.38 = 3,939,541.62/x - Step 3: Cross multiply
7,158,805.62x = 9,879,153.38 × 3,939,541.62 - Step 4: Simplify right side
7,158,805.62x = 38,919,335,910,873.68 - Step 5: Solve for x
x = 38,919,335,910,873.68/7,158,805.62 - Step 6: Final answer
x = 5,436,568.33
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.