Finding the Fourth Proportional to 20,996,885.75, 28,975,702.74 and 11,339,093.75
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Solution
The fourth proportional to 20,996,885.75, 28,975,702.74 and 11,339,093.75 is: 15,647,949.59
Step by Step Solution
- Step 1: Write the proportion equation
20,996,885.75 : 28,975,702.74 = 11,339,093.75 : x - Step 2: Convert to fraction form
20,996,885.75/28,975,702.74 = 11,339,093.75/x - Step 3: Cross multiply
20,996,885.75x = 28,975,702.74 × 11,339,093.75 - Step 4: Simplify right side
20,996,885.75x = 328,558,209,840,991.88 - Step 5: Solve for x
x = 328,558,209,840,991.88/20,996,885.75 - Step 6: Final answer
x = 15,647,949.59
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1.5x scale
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.