Finding the Fourth Proportional to 20,126.90, 27,775.44 and 11,174.99
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Solution
The fourth proportional to 20,126.90, 27,775.44 and 11,174.99 is: 15,421.66
Step by Step Solution
- Step 1: Write the proportion equation
20,126.90 : 27,775.44 = 11,174.99 : x - Step 2: Convert to fraction form
20,126.90/27,775.44 = 11,174.99/x - Step 3: Cross multiply
20,126.90x = 27,775.44 × 11,174.99 - Step 4: Simplify right side
20,126.90x = 310,390,264.25 - Step 5: Solve for x
x = 310,390,264.25/20,126.90 - Step 6: Final answer
x = 15,421.66
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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.