Home / 13,286.54-19,931.03-3,425.85

Finding the Fourth Proportional to 13,286.54, 19,931.03 and 3,425.85

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Solution

The fourth proportional to 13,286.54, 19,931.03 and 3,425.85 is: 5,139.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.54 : 19,931.03 = 3,425.85 : x
  2. Step 2: Convert to fraction form
    13,286.54/19,931.03 = 3,425.85/x
  3. Step 3: Cross multiply
    13,286.54x = 19,931.03 × 3,425.85
  4. Step 4: Simplify right side
    13,286.54x = 68,280,719.13
  5. Step 5: Solve for x
    x = 68,280,719.13/13,286.54
  6. Step 6: Final answer
    x = 5,139.09

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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.