Home / 13,716.41-18,928.62-7,428.78

Finding the Fourth Proportional to 13,716.41, 18,928.62 and 7,428.78

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Solution

The fourth proportional to 13,716.41, 18,928.62 and 7,428.78 is: 10,251.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.41 : 18,928.62 = 7,428.78 : x
  2. Step 2: Convert to fraction form
    13,716.41/18,928.62 = 7,428.78/x
  3. Step 3: Cross multiply
    13,716.41x = 18,928.62 × 7,428.78
  4. Step 4: Simplify right side
    13,716.41x = 140,616,553.68
  5. Step 5: Solve for x
    x = 140,616,553.68/13,716.41
  6. Step 6: Final answer
    x = 10,251.71

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1.5x scale

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.