Finding the Fourth Proportional to 12,138,114.40, 18,204,838.80 and 3,618,728.80
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Solution
The fourth proportional to 12,138,114.40, 18,204,838.80 and 3,618,728.80 is: 5,427,397.72
Step by Step Solution
- Step 1: Write the proportion equation
12,138,114.40 : 18,204,838.80 = 3,618,728.80 : x - Step 2: Convert to fraction form
12,138,114.40/18,204,838.80 = 3,618,728.80/x - Step 3: Cross multiply
12,138,114.40x = 18,204,838.80 × 3,618,728.80 - Step 4: Simplify right side
12,138,114.40x = 65,878,374,464,917.44 - Step 5: Solve for x
x = 65,878,374,464,917.44/12,138,114.40 - Step 6: Final answer
x = 5,427,397.72
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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.