Finding the Fourth Proportional to 20,488,638.24, 28,274,311.44 and 11,321,200.80
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Solution
The fourth proportional to 20,488,638.24, 28,274,311.44 and 11,321,200.80 is: 15,623,251.95
Step by Step Solution
- Step 1: Write the proportion equation
20,488,638.24 : 28,274,311.44 = 11,321,200.80 : x - Step 2: Convert to fraction form
20,488,638.24/28,274,311.44 = 11,321,200.80/x - Step 3: Cross multiply
20,488,638.24x = 28,274,311.44 × 11,321,200.80 - Step 4: Simplify right side
20,488,638.24x = 320,099,157,293,977.19 - Step 5: Solve for x
x = 320,099,157,293,977.19/20,488,638.24 - Step 6: Final answer
x = 15,623,251.95
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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.