Finding the Fourth Proportional to 20,687,323.62, 28,548,506.34 and 11,990,540.70
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Solution
The fourth proportional to 20,687,323.62, 28,548,506.34 and 11,990,540.70 is: 16,546,946.02
Step by Step Solution
- Step 1: Write the proportion equation
20,687,323.62 : 28,548,506.34 = 11,990,540.70 : x - Step 2: Convert to fraction form
20,687,323.62/28,548,506.34 = 11,990,540.70/x - Step 3: Cross multiply
20,687,323.62x = 28,548,506.34 × 11,990,540.70 - Step 4: Simplify right side
20,687,323.62x = 342,312,027,193,978 - Step 5: Solve for x
x = 342,312,027,193,978/20,687,323.62 - Step 6: Final answer
x = 16,546,946.02
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.