Finding the Fourth Proportional to 7,158,882.18, 9,879,258.81 and 3,939,618.18
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Solution
The fourth proportional to 7,158,882.18, 9,879,258.81 and 3,939,618.18 is: 5,436,673.86
Step by Step Solution
- Step 1: Write the proportion equation
7,158,882.18 : 9,879,258.81 = 3,939,618.18 : x - Step 2: Convert to fraction form
7,158,882.18/9,879,258.81 = 3,939,618.18/x - Step 3: Cross multiply
7,158,882.18x = 9,879,258.81 × 3,939,618.18 - Step 4: Simplify right side
7,158,882.18x = 38,920,507,612,801.17 - Step 5: Solve for x
x = 38,920,507,612,801.17/7,158,882.18 - Step 6: Final answer
x = 5,436,673.86
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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.