Finding the Fourth Proportional to 13,078,894.80, 19,618,342.20 and 12,491,029.20
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Solution
The fourth proportional to 13,078,894.80, 19,618,342.20 and 12,491,029.20 is: 18,736,543.80
Step by Step Solution
- Step 1: Write the proportion equation
13,078,894.80 : 19,618,342.20 = 12,491,029.20 : x - Step 2: Convert to fraction form
13,078,894.80/19,618,342.20 = 12,491,029.20/x - Step 3: Cross multiply
13,078,894.80x = 19,618,342.20 × 12,491,029.20 - Step 4: Simplify right side
13,078,894.80x = 245,053,285,275,792.22 - Step 5: Solve for x
x = 245,053,285,275,792.22/13,078,894.80 - Step 6: Final answer
x = 18,736,543.80
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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.