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Finding the Fourth Proportional to 18,303.98, 27,443.21 and 8,429.67

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Solution

The fourth proportional to 18,303.98, 27,443.21 and 8,429.67 is: 12,638.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,303.98 : 27,443.21 = 8,429.67 : x
  2. Step 2: Convert to fraction form
    18,303.98/27,443.21 = 8,429.67/x
  3. Step 3: Cross multiply
    18,303.98x = 27,443.21 × 8,429.67
  4. Step 4: Simplify right side
    18,303.98x = 231,337,161.89
  5. Step 5: Solve for x
    x = 231,337,161.89/18,303.98
  6. Step 6: Final answer
    x = 12,638.63

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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.