Finding the Fourth Proportional to 21,107,790.72, 29,128,760.64 and 11,940,238.08
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Solution
The fourth proportional to 21,107,790.72, 29,128,760.64 and 11,940,238.08 is: 16,477,533.89
Step by Step Solution
- Step 1: Write the proportion equation
21,107,790.72 : 29,128,760.64 = 11,940,238.08 : x - Step 2: Convert to fraction form
21,107,790.72/29,128,760.64 = 11,940,238.08/x - Step 3: Cross multiply
21,107,790.72x = 29,128,760.64 × 11,940,238.08 - Step 4: Simplify right side
21,107,790.72x = 347,804,337,016,933.19 - Step 5: Solve for x
x = 347,804,337,016,933.19/21,107,790.72 - Step 6: Final answer
x = 16,477,533.89
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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.