Finding the Fourth Proportional to 20,581,349.67, 28,408,622.41 and 13,239,182.80
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Solution
The fourth proportional to 20,581,349.67, 28,408,622.41 and 13,239,182.80 is: 18,274,163.32
Step by Step Solution
- Step 1: Write the proportion equation
20,581,349.67 : 28,408,622.41 = 13,239,182.80 : x - Step 2: Convert to fraction form
20,581,349.67/28,408,622.41 = 13,239,182.80/x - Step 3: Cross multiply
20,581,349.67x = 28,408,622.41 × 13,239,182.80 - Step 4: Simplify right side
20,581,349.67x = 376,106,945,155,108.94 - Step 5: Solve for x
x = 376,106,945,155,108.94/20,581,349.67 - Step 6: Final answer
x = 18,274,163.32
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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.