Finding the Fourth Proportional to 12,986,431.92, 19,479,631.68 and 5,208,857.28
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Solution
The fourth proportional to 12,986,431.92, 19,479,631.68 and 5,208,857.28 is: 7,813,279.42
Step by Step Solution
- Step 1: Write the proportion equation
12,986,431.92 : 19,479,631.68 = 5,208,857.28 : x - Step 2: Convert to fraction form
12,986,431.92/19,479,631.68 = 5,208,857.28/x - Step 3: Cross multiply
12,986,431.92x = 19,479,631.68 × 5,208,857.28 - Step 4: Simplify right side
12,986,431.92x = 101,466,621,288,086.64 - Step 5: Solve for x
x = 101,466,621,288,086.64/12,986,431.92 - Step 6: Final answer
x = 7,813,279.42
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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.