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Finding the Fourth Proportional to 13,242.60, 19,863.88 and 3,381.88

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Solution

The fourth proportional to 13,242.60, 19,863.88 and 3,381.88 is: 5,072.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,242.60 : 19,863.88 = 3,381.88 : x
  2. Step 2: Convert to fraction form
    13,242.60/19,863.88 = 3,381.88/x
  3. Step 3: Cross multiply
    13,242.60x = 19,863.88 × 3,381.88
  4. Step 4: Simplify right side
    13,242.60x = 67,177,258.49
  5. Step 5: Solve for x
    x = 67,177,258.49/13,242.60
  6. Step 6: Final answer
    x = 5,072.81

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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.