Finding the Fourth Proportional to 20,972,220.41, 28,942,562.09 and 11,679,790.42
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Solution
The fourth proportional to 20,972,220.41, 28,942,562.09 and 11,679,790.42 is: 16,118,610.85
Step by Step Solution
- Step 1: Write the proportion equation
20,972,220.41 : 28,942,562.09 = 11,679,790.42 : x - Step 2: Convert to fraction form
20,972,220.41/28,942,562.09 = 11,679,790.42/x - Step 3: Cross multiply
20,972,220.41x = 28,942,562.09 × 11,679,790.42 - Step 4: Simplify right side
20,972,220.41x = 338,043,059,429,037.19 - Step 5: Solve for x
x = 338,043,059,429,037.19/20,972,220.41 - Step 6: Final answer
x = 16,118,610.85
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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.