Finding the Fourth Proportional to 18,901,871.80, 28,352,807.70 and 5,438,699.80
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Solution
The fourth proportional to 18,901,871.80, 28,352,807.70 and 5,438,699.80 is: 8,158,049.70
Step by Step Solution
- Step 1: Write the proportion equation
18,901,871.80 : 28,352,807.70 = 5,438,699.80 : x - Step 2: Convert to fraction form
18,901,871.80/28,352,807.70 = 5,438,699.80/x - Step 3: Cross multiply
18,901,871.80x = 28,352,807.70 × 5,438,699.80 - Step 4: Simplify right side
18,901,871.80x = 154,202,409,567,428.44 - Step 5: Solve for x
x = 154,202,409,567,428.44/18,901,871.80 - Step 6: Final answer
x = 8,158,049.70
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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.