Finding the Fourth Proportional to 20,221,230.30, 30,328,855.64 and 7,438,745.66
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Solution
The fourth proportional to 20,221,230.30, 30,328,855.64 and 7,438,745.66 is: 11,157,018.62
Step by Step Solution
- Step 1: Write the proportion equation
20,221,230.30 : 30,328,855.64 = 7,438,745.66 : x - Step 2: Convert to fraction form
20,221,230.30/30,328,855.64 = 7,438,745.66/x - Step 3: Cross multiply
20,221,230.30x = 30,328,855.64 × 7,438,745.66 - Step 4: Simplify right side
20,221,230.30x = 225,608,643,075,978.53 - Step 5: Solve for x
x = 225,608,643,075,978.53/20,221,230.30 - Step 6: Final answer
x = 11,157,018.62
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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.