Finding the Fourth Proportional to 21,428,509.64, 29,571,560.34 and 11,639,145
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Solution
The fourth proportional to 21,428,509.64, 29,571,560.34 and 11,639,145 is: 16,062,137.99
Step by Step Solution
- Step 1: Write the proportion equation
21,428,509.64 : 29,571,560.34 = 11,639,145 : x - Step 2: Convert to fraction form
21,428,509.64/29,571,560.34 = 11,639,145/x - Step 3: Cross multiply
21,428,509.64x = 29,571,560.34 × 11,639,145 - Step 4: Simplify right side
21,428,509.64x = 344,187,678,673,509.31 - Step 5: Solve for x
x = 344,187,678,673,509.31/21,428,509.64 - Step 6: Final answer
x = 16,062,137.99
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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.