Finding the Fourth Proportional to 13,320,585.14, 18,380,442.11 and 7,811,880.23
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Solution
The fourth proportional to 13,320,585.14, 18,380,442.11 and 7,811,880.23 is: 10,779,242.12
Step by Step Solution
- Step 1: Write the proportion equation
13,320,585.14 : 18,380,442.11 = 7,811,880.23 : x - Step 2: Convert to fraction form
13,320,585.14/18,380,442.11 = 7,811,880.23/x - Step 3: Cross multiply
13,320,585.14x = 18,380,442.11 × 7,811,880.23 - Step 4: Simplify right side
13,320,585.14x = 143,585,812,344,660.19 - Step 5: Solve for x
x = 143,585,812,344,660.19/13,320,585.14 - Step 6: Final answer
x = 10,779,242.12
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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.