Finding the Fourth Proportional to 15,201.28, 20,977.08 and 8,486.75
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Solution
The fourth proportional to 15,201.28, 20,977.08 and 8,486.75 is: 11,711.33
Step by Step Solution
- Step 1: Write the proportion equation
15,201.28 : 20,977.08 = 8,486.75 : x - Step 2: Convert to fraction form
15,201.28/20,977.08 = 8,486.75/x - Step 3: Cross multiply
15,201.28x = 20,977.08 × 8,486.75 - Step 4: Simplify right side
15,201.28x = 178,027,233.69 - Step 5: Solve for x
x = 178,027,233.69/15,201.28 - Step 6: Final answer
x = 11,711.33
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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.