Finding the Fourth Proportional to 12,990,850.80, 19,486,276.20 and 12,294,121.20
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Solution
The fourth proportional to 12,990,850.80, 19,486,276.20 and 12,294,121.20 is: 18,441,181.80
Step by Step Solution
- Step 1: Write the proportion equation
12,990,850.80 : 19,486,276.20 = 12,294,121.20 : x - Step 2: Convert to fraction form
12,990,850.80/19,486,276.20 = 12,294,121.20/x - Step 3: Cross multiply
12,990,850.80x = 19,486,276.20 × 12,294,121.20 - Step 4: Simplify right side
12,990,850.80x = 239,566,641,339,475.41 - Step 5: Solve for x
x = 239,566,641,339,475.41/12,990,850.80 - Step 6: Final answer
x = 18,441,181.80
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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.