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Finding the Fourth Proportional to 13,863.60, 19,119 and 9,393.90

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Solution

The fourth proportional to 13,863.60, 19,119 and 9,393.90 is: 12,954.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,863.60 : 19,119 = 9,393.90 : x
  2. Step 2: Convert to fraction form
    13,863.60/19,119 = 9,393.90/x
  3. Step 3: Cross multiply
    13,863.60x = 19,119 × 9,393.90
  4. Step 4: Simplify right side
    13,863.60x = 179,601,974.10
  5. Step 5: Solve for x
    x = 179,601,974.10/13,863.60
  6. Step 6: Final answer
    x = 12,954.93

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Why These Related Problems?

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