Finding the Fourth Proportional to 20,796,998.76, 28,690,187.04 and 13,457,201.31
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Solution
The fourth proportional to 20,796,998.76, 28,690,187.04 and 13,457,201.31 is: 18,564,679.79
Step by Step Solution
- Step 1: Write the proportion equation
20,796,998.76 : 28,690,187.04 = 13,457,201.31 : x - Step 2: Convert to fraction form
20,796,998.76/28,690,187.04 = 13,457,201.31/x - Step 3: Cross multiply
20,796,998.76x = 28,690,187.04 × 13,457,201.31 - Step 4: Simplify right side
20,796,998.76x = 386,089,622,618,833 - Step 5: Solve for x
x = 386,089,622,618,833/20,796,998.76 - Step 6: Final answer
x = 18,564,679.79
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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.