Finding the Fourth Proportional to 18,509,721.60, 27,768,729.60 and 7,149,158.40
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Solution
The fourth proportional to 18,509,721.60, 27,768,729.60 and 7,149,158.40 is: 10,725,339.41
Step by Step Solution
- Step 1: Write the proportion equation
18,509,721.60 : 27,768,729.60 = 7,149,158.40 : x - Step 2: Convert to fraction form
18,509,721.60/27,768,729.60 = 7,149,158.40/x - Step 3: Cross multiply
18,509,721.60x = 27,768,729.60 × 7,149,158.40 - Step 4: Simplify right side
18,509,721.60x = 198,523,046,477,168.66 - Step 5: Solve for x
x = 198,523,046,477,168.66/18,509,721.60 - Step 6: Final answer
x = 10,725,339.41
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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.