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Finding the Fourth Proportional to 13,900.56, 19,178.76 and 8,310.48

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Solution

The fourth proportional to 13,900.56, 19,178.76 and 8,310.48 is: 11,466.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,900.56 : 19,178.76 = 8,310.48 : x
  2. Step 2: Convert to fraction form
    13,900.56/19,178.76 = 8,310.48/x
  3. Step 3: Cross multiply
    13,900.56x = 19,178.76 × 8,310.48
  4. Step 4: Simplify right side
    13,900.56x = 159,384,701.40
  5. Step 5: Solve for x
    x = 159,384,701.40/13,900.56
  6. Step 6: Final answer
    x = 11,466.06

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.