Finding the Fourth Proportional to 20,479,153.99, 28,260,692.89 and 11,311,599.91
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Solution
The fourth proportional to 20,479,153.99, 28,260,692.89 and 11,311,599.91 is: 15,609,709.82
Step by Step Solution
- Step 1: Write the proportion equation
20,479,153.99 : 28,260,692.89 = 11,311,599.91 : x - Step 2: Convert to fraction form
20,479,153.99/28,260,692.89 = 11,311,599.91/x - Step 3: Cross multiply
20,479,153.99x = 28,260,692.89 × 11,311,599.91 - Step 4: Simplify right side
20,479,153.99x = 319,673,651,151,061.62 - Step 5: Solve for x
x = 319,673,651,151,061.62/20,479,153.99 - Step 6: Final answer
x = 15,609,709.82
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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.