Finding the Fourth Proportional to 7,158,807.62, 9,879,156.14 and 3,939,543.62
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Solution
The fourth proportional to 7,158,807.62, 9,879,156.14 and 3,939,543.62 is: 5,436,571.09
Step by Step Solution
- Step 1: Write the proportion equation
7,158,807.62 : 9,879,156.14 = 3,939,543.62 : x - Step 2: Convert to fraction form
7,158,807.62/9,879,156.14 = 3,939,543.62/x - Step 3: Cross multiply
7,158,807.62x = 9,879,156.14 × 3,939,543.62 - Step 4: Simplify right side
7,158,807.62x = 38,919,366,542,320.83 - Step 5: Solve for x
x = 38,919,366,542,320.83/7,158,807.62 - Step 6: Final answer
x = 5,436,571.09
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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.