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Finding the Fourth Proportional to 37,620.60, 56,434.20 and 12,651.72

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Solution

The fourth proportional to 37,620.60, 56,434.20 and 12,651.72 is: 18,978.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,620.60 : 56,434.20 = 12,651.72 : x
  2. Step 2: Convert to fraction form
    37,620.60/56,434.20 = 12,651.72/x
  3. Step 3: Cross multiply
    37,620.60x = 56,434.20 × 12,651.72
  4. Step 4: Simplify right side
    37,620.60x = 713,989,696.82
  5. Step 5: Solve for x
    x = 713,989,696.82/37,620.60
  6. Step 6: Final answer
    x = 18,978.69

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.