Finding the Fourth Proportional to 18,939,993.68, 28,406,880.12 and 8,154,390.80
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Solution
The fourth proportional to 18,939,993.68, 28,406,880.12 and 8,154,390.80 is: 12,230,247.05
Step by Step Solution
- Step 1: Write the proportion equation
18,939,993.68 : 28,406,880.12 = 8,154,390.80 : x - Step 2: Convert to fraction form
18,939,993.68/28,406,880.12 = 8,154,390.80/x - Step 3: Cross multiply
18,939,993.68x = 28,406,880.12 × 8,154,390.80 - Step 4: Simplify right side
18,939,993.68x = 231,640,801,907,230.91 - Step 5: Solve for x
x = 231,640,801,907,230.91/18,939,993.68 - Step 6: Final answer
x = 12,230,247.05
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.