Finding the Fourth Proportional to 12,310,378.21, 16,990,431.44 and 7,156,729.11
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Solution
The fourth proportional to 12,310,378.21, 16,990,431.44 and 7,156,729.11 is: 9,877,512.55
Step by Step Solution
- Step 1: Write the proportion equation
12,310,378.21 : 16,990,431.44 = 7,156,729.11 : x - Step 2: Convert to fraction form
12,310,378.21/16,990,431.44 = 7,156,729.11/x - Step 3: Cross multiply
12,310,378.21x = 16,990,431.44 × 7,156,729.11 - Step 4: Simplify right side
12,310,378.21x = 121,595,915,278,107.23 - Step 5: Solve for x
x = 121,595,915,278,107.23/12,310,378.21 - Step 6: Final answer
x = 9,877,512.55
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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.