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Finding the Fourth Proportional to 13,318.21, 19,981.97 and 5,921.97

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Solution

The fourth proportional to 13,318.21, 19,981.97 and 5,921.97 is: 8,885.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.21 : 19,981.97 = 5,921.97 : x
  2. Step 2: Convert to fraction form
    13,318.21/19,981.97 = 5,921.97/x
  3. Step 3: Cross multiply
    13,318.21x = 19,981.97 × 5,921.97
  4. Step 4: Simplify right side
    13,318.21x = 118,332,626.88
  5. Step 5: Solve for x
    x = 118,332,626.88/13,318.21
  6. Step 6: Final answer
    x = 8,885.02

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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.