Home / 13,716.24-18,928.43-7,428.61

Finding the Fourth Proportional to 13,716.24, 18,928.43 and 7,428.61

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Solution

The fourth proportional to 13,716.24, 18,928.43 and 7,428.61 is: 10,251.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.24 : 18,928.43 = 7,428.61 : x
  2. Step 2: Convert to fraction form
    13,716.24/18,928.43 = 7,428.61/x
  3. Step 3: Cross multiply
    13,716.24x = 18,928.43 × 7,428.61
  4. Step 4: Simplify right side
    13,716.24x = 140,611,980.54
  5. Step 5: Solve for x
    x = 140,611,980.54/13,716.24
  6. Step 6: Final answer
    x = 10,251.50

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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.