Home / 13,884.78-20,835.27-5,125.71

Finding the Fourth Proportional to 13,884.78, 20,835.27 and 5,125.71

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Solution

The fourth proportional to 13,884.78, 20,835.27 and 5,125.71 is: 7,691.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,884.78 : 20,835.27 = 5,125.71 : x
  2. Step 2: Convert to fraction form
    13,884.78/20,835.27 = 5,125.71/x
  3. Step 3: Cross multiply
    13,884.78x = 20,835.27 × 5,125.71
  4. Step 4: Simplify right side
    13,884.78x = 106,795,551.79
  5. Step 5: Solve for x
    x = 106,795,551.79/13,884.78
  6. Step 6: Final answer
    x = 7,691.56

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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.