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Finding the Fourth Proportional to 11,201.72, 16,790.86 and 4,178.91

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Solution

The fourth proportional to 11,201.72, 16,790.86 and 4,178.91 is: 6,263.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,201.72 : 16,790.86 = 4,178.91 : x
  2. Step 2: Convert to fraction form
    11,201.72/16,790.86 = 4,178.91/x
  3. Step 3: Cross multiply
    11,201.72x = 16,790.86 × 4,178.91
  4. Step 4: Simplify right side
    11,201.72x = 70,167,492.76
  5. Step 5: Solve for x
    x = 70,167,492.76/11,201.72
  6. Step 6: Final answer
    x = 6,263.99

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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.