Finding the Fourth Proportional to 18,339,728.13, 25,331,021.56 and 13,370,299.59
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Solution
The fourth proportional to 18,339,728.13, 25,331,021.56 and 13,370,299.59 is: 18,467,195.64
Step by Step Solution
- Step 1: Write the proportion equation
18,339,728.13 : 25,331,021.56 = 13,370,299.59 : x - Step 2: Convert to fraction form
18,339,728.13/25,331,021.56 = 13,370,299.59/x - Step 3: Cross multiply
18,339,728.13x = 25,331,021.56 × 13,370,299.59 - Step 4: Simplify right side
18,339,728.13x = 338,683,347,289,653.38 - Step 5: Solve for x
x = 338,683,347,289,653.38/18,339,728.13 - Step 6: Final answer
x = 18,467,195.64
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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.