Finding the Fourth Proportional to 12,302,943.20, 18,454,414.80 and 5,128,489.70
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Solution
The fourth proportional to 12,302,943.20, 18,454,414.80 and 5,128,489.70 is: 7,692,734.55
Step by Step Solution
- Step 1: Write the proportion equation
12,302,943.20 : 18,454,414.80 = 5,128,489.70 : x - Step 2: Convert to fraction form
12,302,943.20/18,454,414.80 = 5,128,489.70/x - Step 3: Cross multiply
12,302,943.20x = 18,454,414.80 × 5,128,489.70 - Step 4: Simplify right side
12,302,943.20x = 94,643,276,221,327.56 - Step 5: Solve for x
x = 94,643,276,221,327.56/12,302,943.20 - Step 6: Final answer
x = 7,692,734.55
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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.