Finding the Fourth Proportional to 12,478,107.52, 18,718,394.88 and 5,190,071.68
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Solution
The fourth proportional to 12,478,107.52, 18,718,394.88 and 5,190,071.68 is: 7,785,620.62
Step by Step Solution
- Step 1: Write the proportion equation
12,478,107.52 : 18,718,394.88 = 5,190,071.68 : x - Step 2: Convert to fraction form
12,478,107.52/18,718,394.88 = 5,190,071.68/x - Step 3: Cross multiply
12,478,107.52x = 18,718,394.88 × 5,190,071.68 - Step 4: Simplify right side
12,478,107.52x = 97,149,811,161,744.98 - Step 5: Solve for x
x = 97,149,811,161,744.98/12,478,107.52 - Step 6: Final answer
x = 7,785,620.62
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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.