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Finding the Fourth Proportional to 13,716.52, 18,928.78 and 7,428.92

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Solution

The fourth proportional to 13,716.52, 18,928.78 and 7,428.92 is: 10,251.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.52 : 18,928.78 = 7,428.92 : x
  2. Step 2: Convert to fraction form
    13,716.52/18,928.78 = 7,428.92/x
  3. Step 3: Cross multiply
    13,716.52x = 18,928.78 × 7,428.92
  4. Step 4: Simplify right side
    13,716.52x = 140,620,392.32
  5. Step 5: Solve for x
    x = 140,620,392.32/13,716.52
  6. Step 6: Final answer
    x = 10,251.90

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