Finding the Fourth Proportional to 18,986.19, 26,201.12 and 11,028.75
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Solution
The fourth proportional to 18,986.19, 26,201.12 and 11,028.75 is: 15,219.78
Step by Step Solution
- Step 1: Write the proportion equation
18,986.19 : 26,201.12 = 11,028.75 : x - Step 2: Convert to fraction form
18,986.19/26,201.12 = 11,028.75/x - Step 3: Cross multiply
18,986.19x = 26,201.12 × 11,028.75 - Step 4: Simplify right side
18,986.19x = 288,965,547.06 - Step 5: Solve for x
x = 288,965,547.06/18,986.19 - Step 6: Final answer
x = 15,219.78
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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.