Finding the Fourth Proportional to 10,431,942.40, 15,655,689.60 and 5,380,652.80
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Solution
The fourth proportional to 10,431,942.40, 15,655,689.60 and 5,380,652.80 is: 8,074,989.95
Step by Step Solution
- Step 1: Write the proportion equation
10,431,942.40 : 15,655,689.60 = 5,380,652.80 : x - Step 2: Convert to fraction form
10,431,942.40/15,655,689.60 = 5,380,652.80/x - Step 3: Cross multiply
10,431,942.40x = 15,655,689.60 × 5,380,652.80 - Step 4: Simplify right side
10,431,942.40x = 84,237,830,082,170.88 - Step 5: Solve for x
x = 84,237,830,082,170.88/10,431,942.40 - Step 6: Final answer
x = 8,074,989.95
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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.