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Finding the Fourth Proportional to 19,318,689.60, 28,978,034.40 and 8,701,857.60

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Solution

The fourth proportional to 19,318,689.60, 28,978,034.40 and 8,701,857.60 is: 13,052,786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,318,689.60 : 28,978,034.40 = 8,701,857.60 : x
  2. Step 2: Convert to fraction form
    19,318,689.60/28,978,034.40 = 8,701,857.60/x
  3. Step 3: Cross multiply
    19,318,689.60x = 28,978,034.40 × 8,701,857.60
  4. Step 4: Simplify right side
    19,318,689.60x = 252,162,728,876,701.41
  5. Step 5: Solve for x
    x = 252,162,728,876,701.41/19,318,689.60
  6. Step 6: Final answer
    x = 13,052,786.40

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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.