Finding the Fourth Proportional to 12,474,149.40, 18,711,224.10 and 7,687,243.80
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Solution
The fourth proportional to 12,474,149.40, 18,711,224.10 and 7,687,243.80 is: 11,530,865.70
Step by Step Solution
- Step 1: Write the proportion equation
12,474,149.40 : 18,711,224.10 = 7,687,243.80 : x - Step 2: Convert to fraction form
12,474,149.40/18,711,224.10 = 7,687,243.80/x - Step 3: Cross multiply
12,474,149.40x = 18,711,224.10 × 7,687,243.80 - Step 4: Simplify right side
12,474,149.40x = 143,837,741,453,135.59 - Step 5: Solve for x
x = 143,837,741,453,135.59/12,474,149.40 - Step 6: Final answer
x = 11,530,865.70
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Double scale
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Similar ratio
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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.