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Finding the Fourth Proportional to 12,379.13, 18,564.07 and 4,981.09

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Solution

The fourth proportional to 12,379.13, 18,564.07 and 4,981.09 is: 7,469.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.13 : 18,564.07 = 4,981.09 : x
  2. Step 2: Convert to fraction form
    12,379.13/18,564.07 = 4,981.09/x
  3. Step 3: Cross multiply
    12,379.13x = 18,564.07 × 4,981.09
  4. Step 4: Simplify right side
    12,379.13x = 92,469,303.44
  5. Step 5: Solve for x
    x = 92,469,303.44/12,379.13
  6. Step 6: Final answer
    x = 7,469.77

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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.