Finding the Fourth Proportional to 20,512,643.20, 30,771,729.60 and 7,053,596.80
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Solution
The fourth proportional to 20,512,643.20, 30,771,729.60 and 7,053,596.80 is: 10,581,345.92
Step by Step Solution
- Step 1: Write the proportion equation
20,512,643.20 : 30,771,729.60 = 7,053,596.80 : x - Step 2: Convert to fraction form
20,512,643.20/30,771,729.60 = 7,053,596.80/x - Step 3: Cross multiply
20,512,643.20x = 30,771,729.60 × 7,053,596.80 - Step 4: Simplify right side
20,512,643.20x = 217,051,373,437,025.28 - Step 5: Solve for x
x = 217,051,373,437,025.28/20,512,643.20 - Step 6: Final answer
x = 10,581,345.92
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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.