Home / 10,251.92-15,378.30-5,318.39

Finding the Fourth Proportional to 10,251.92, 15,378.30 and 5,318.39

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Solution

The fourth proportional to 10,251.92, 15,378.30 and 5,318.39 is: 7,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,251.92 : 15,378.30 = 5,318.39 : x
  2. Step 2: Convert to fraction form
    10,251.92/15,378.30 = 5,318.39/x
  3. Step 3: Cross multiply
    10,251.92x = 15,378.30 × 5,318.39
  4. Step 4: Simplify right side
    10,251.92x = 81,787,720.05
  5. Step 5: Solve for x
    x = 81,787,720.05/10,251.92
  6. Step 6: Final answer
    x = 7,977.80

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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.