Finding the Fourth Proportional to 20,689,833.60, 28,555,444.80 and 11,993,446.08
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Solution
The fourth proportional to 20,689,833.60, 28,555,444.80 and 11,993,446.08 is: 16,552,969.64
Step by Step Solution
- Step 1: Write the proportion equation
20,689,833.60 : 28,555,444.80 = 11,993,446.08 : x - Step 2: Convert to fraction form
20,689,833.60/28,555,444.80 = 11,993,446.08/x - Step 3: Cross multiply
20,689,833.60x = 28,555,444.80 × 11,993,446.08 - Step 4: Simplify right side
20,689,833.60x = 342,478,187,499,216.38 - Step 5: Solve for x
x = 342,478,187,499,216.38/20,689,833.60 - Step 6: Final answer
x = 16,552,969.64
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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.