Finding the Fourth Proportional to 20,138,400.80, 30,207,601.20 and 16,989,120.80
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Solution
The fourth proportional to 20,138,400.80, 30,207,601.20 and 16,989,120.80 is: 25,483,681.20
Step by Step Solution
- Step 1: Write the proportion equation
20,138,400.80 : 30,207,601.20 = 16,989,120.80 : x - Step 2: Convert to fraction form
20,138,400.80/30,207,601.20 = 16,989,120.80/x - Step 3: Cross multiply
20,138,400.80x = 30,207,601.20 × 16,989,120.80 - Step 4: Simplify right side
20,138,400.80x = 513,200,585,865,025 - Step 5: Solve for x
x = 513,200,585,865,025/20,138,400.80 - Step 6: Final answer
x = 25,483,681.20
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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.