Finding the Fourth Proportional to 20,112,138.40, 30,168,207.60 and 18,677,247.70
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Solution
The fourth proportional to 20,112,138.40, 30,168,207.60 and 18,677,247.70 is: 28,015,871.55
Step by Step Solution
- Step 1: Write the proportion equation
20,112,138.40 : 30,168,207.60 = 18,677,247.70 : x - Step 2: Convert to fraction form
20,112,138.40/30,168,207.60 = 18,677,247.70/x - Step 3: Cross multiply
20,112,138.40x = 30,168,207.60 × 18,677,247.70 - Step 4: Simplify right side
20,112,138.40x = 563,459,086,010,222.50 - Step 5: Solve for x
x = 563,459,086,010,222.50/20,112,138.40 - Step 6: Final answer
x = 28,015,871.55
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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.