Finding the Fourth Proportional to 7,428,845.28, 11,128,917.84 and 5,480,137.44
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Solution
The fourth proportional to 7,428,845.28, 11,128,917.84 and 5,480,137.44 is: 8,209,620.34
Step by Step Solution
- Step 1: Write the proportion equation
7,428,845.28 : 11,128,917.84 = 5,480,137.44 : x - Step 2: Convert to fraction form
7,428,845.28/11,128,917.84 = 5,480,137.44/x - Step 3: Cross multiply
7,428,845.28x = 11,128,917.84 × 5,480,137.44 - Step 4: Simplify right side
7,428,845.28x = 60,987,999,321,667.93 - Step 5: Solve for x
x = 60,987,999,321,667.93/7,428,845.28 - Step 6: Final answer
x = 8,209,620.34
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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.