Finding the Fourth Proportional to 19,379,812.80, 29,069,719.20 and 12,213,451.20
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Solution
The fourth proportional to 19,379,812.80, 29,069,719.20 and 12,213,451.20 is: 18,320,176.80
Step by Step Solution
- Step 1: Write the proportion equation
19,379,812.80 : 29,069,719.20 = 12,213,451.20 : x - Step 2: Convert to fraction form
19,379,812.80/29,069,719.20 = 12,213,451.20/x - Step 3: Cross multiply
19,379,812.80x = 29,069,719.20 × 12,213,451.20 - Step 4: Simplify right side
19,379,812.80x = 355,041,596,846,903 - Step 5: Solve for x
x = 355,041,596,846,903/19,379,812.80 - Step 6: Final answer
x = 18,320,176.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.