Finding the Fourth Proportional to 20,797,716.40, 28,691,177.22 and 13,457,921.68
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Solution
The fourth proportional to 20,797,716.40, 28,691,177.22 and 13,457,921.68 is: 18,565,673.68
Step by Step Solution
- Step 1: Write the proportion equation
20,797,716.40 : 28,691,177.22 = 13,457,921.68 : x - Step 2: Convert to fraction form
20,797,716.40/28,691,177.22 = 13,457,921.68/x - Step 3: Cross multiply
20,797,716.40x = 28,691,177.22 × 13,457,921.68 - Step 4: Simplify right side
20,797,716.40x = 386,123,615,933,760.12 - Step 5: Solve for x
x = 386,123,615,933,760.12/20,797,716.40 - Step 6: Final answer
x = 18,565,673.68
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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.