Finding the Fourth Proportional to 20,684,390.64, 31,028,704.80 and 7,915,634.88
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Solution
The fourth proportional to 20,684,390.64, 31,028,704.80 and 7,915,634.88 is: 11,874,263.17
Step by Step Solution
- Step 1: Write the proportion equation
20,684,390.64 : 31,028,704.80 = 7,915,634.88 : x - Step 2: Convert to fraction form
20,684,390.64/31,028,704.80 = 7,915,634.88/x - Step 3: Cross multiply
20,684,390.64x = 31,028,704.80 × 7,915,634.88 - Step 4: Simplify right side
20,684,390.64x = 245,611,897,996,103.44 - Step 5: Solve for x
x = 245,611,897,996,103.44/20,684,390.64 - Step 6: Final answer
x = 11,874,263.17
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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.