Finding the Fourth Proportional to 20,769,869.80, 31,154,804.70 and 11,811,917.80
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Solution
The fourth proportional to 20,769,869.80, 31,154,804.70 and 11,811,917.80 is: 17,717,876.70
Step by Step Solution
- Step 1: Write the proportion equation
20,769,869.80 : 31,154,804.70 = 11,811,917.80 : x - Step 2: Convert to fraction form
20,769,869.80/31,154,804.70 = 11,811,917.80/x - Step 3: Cross multiply
20,769,869.80x = 31,154,804.70 × 11,811,917.80 - Step 4: Simplify right side
20,769,869.80x = 367,997,992,191,453.69 - Step 5: Solve for x
x = 367,997,992,191,453.69/20,769,869.80 - Step 6: Final answer
x = 17,717,876.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.