Finding the Fourth Proportional to 20,687,294.19, 28,548,465.73 and 11,990,511.30
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Solution
The fourth proportional to 20,687,294.19, 28,548,465.73 and 11,990,511.30 is: 16,546,905.45
Step by Step Solution
- Step 1: Write the proportion equation
20,687,294.19 : 28,548,465.73 = 11,990,511.30 : x - Step 2: Convert to fraction form
20,687,294.19/28,548,465.73 = 11,990,511.30/x - Step 3: Cross multiply
20,687,294.19x = 28,548,465.73 × 11,990,511.30 - Step 4: Simplify right side
20,687,294.19x = 342,310,701,010,308.25 - Step 5: Solve for x
x = 342,310,701,010,308.25/20,687,294.19 - Step 6: Final answer
x = 16,546,905.45
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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.