Finding the Fourth Proportional to 7,979.60, 11,979.99 and 6,817.07
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Solution
The fourth proportional to 7,979.60, 11,979.99 and 6,817.07 is: 10,234.65
Step by Step Solution
- Step 1: Write the proportion equation
7,979.60 : 11,979.99 = 6,817.07 : x - Step 2: Convert to fraction form
7,979.60/11,979.99 = 6,817.07/x - Step 3: Cross multiply
7,979.60x = 11,979.99 × 6,817.07 - Step 4: Simplify right side
7,979.60x = 81,668,353.49 - Step 5: Solve for x
x = 81,668,353.49/7,979.60 - Step 6: Final answer
x = 10,234.65
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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.