Finding the Fourth Proportional to 13,221,815.67, 18,247,886.01 and 7,420,914.81
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Solution
The fourth proportional to 13,221,815.67, 18,247,886.01 and 7,420,914.81 is: 10,241,861.70
Step by Step Solution
- Step 1: Write the proportion equation
13,221,815.67 : 18,247,886.01 = 7,420,914.81 : x - Step 2: Convert to fraction form
13,221,815.67/18,247,886.01 = 7,420,914.81/x - Step 3: Cross multiply
13,221,815.67x = 18,247,886.01 × 7,420,914.81 - Step 4: Simplify right side
13,221,815.67x = 135,416,007,542,800.81 - Step 5: Solve for x
x = 135,416,007,542,800.81/13,221,815.67 - Step 6: Final answer
x = 10,241,861.70
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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.