Finding the Fourth Proportional to 20,275,453.40, 27,979,548.86 and 11,902,688.73
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Solution
The fourth proportional to 20,275,453.40, 27,979,548.86 and 11,902,688.73 is: 16,425,371.82
Step by Step Solution
- Step 1: Write the proportion equation
20,275,453.40 : 27,979,548.86 = 11,902,688.73 : x - Step 2: Convert to fraction form
20,275,453.40/27,979,548.86 = 11,902,688.73/x - Step 3: Cross multiply
20,275,453.40x = 27,979,548.86 × 11,902,688.73 - Step 4: Simplify right side
20,275,453.40x = 333,031,860,886,406.38 - Step 5: Solve for x
x = 333,031,860,886,406.38/20,275,453.40 - Step 6: Final answer
x = 16,425,371.82
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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.