Finding the Fourth Proportional to 12,128,575.20, 18,192,862.80 and 5,751,283.20
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Solution
The fourth proportional to 12,128,575.20, 18,192,862.80 and 5,751,283.20 is: 8,626,924.80
Step by Step Solution
- Step 1: Write the proportion equation
12,128,575.20 : 18,192,862.80 = 5,751,283.20 : x - Step 2: Convert to fraction form
12,128,575.20/18,192,862.80 = 5,751,283.20/x - Step 3: Cross multiply
12,128,575.20x = 18,192,862.80 × 5,751,283.20 - Step 4: Simplify right side
12,128,575.20x = 104,632,306,181,544.97 - Step 5: Solve for x
x = 104,632,306,181,544.97/12,128,575.20 - Step 6: Final answer
x = 8,626,924.80
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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.