Finding the Fourth Proportional to 7,415.40, 11,119.80 and 2,221.68
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Solution
The fourth proportional to 7,415.40, 11,119.80 and 2,221.68 is: 3,331.53
Step by Step Solution
- Step 1: Write the proportion equation
7,415.40 : 11,119.80 = 2,221.68 : x - Step 2: Convert to fraction form
7,415.40/11,119.80 = 2,221.68/x - Step 3: Cross multiply
7,415.40x = 11,119.80 × 2,221.68 - Step 4: Simplify right side
7,415.40x = 24,704,637.26 - Step 5: Solve for x
x = 24,704,637.26/7,415.40 - Step 6: Final answer
x = 3,331.53
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.