Home / 13,251-19,877.20-3,390.37

Finding the Fourth Proportional to 13,251, 19,877.20 and 3,390.37

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Solution

The fourth proportional to 13,251, 19,877.20 and 3,390.37 is: 5,085.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251 : 19,877.20 = 3,390.37 : x
  2. Step 2: Convert to fraction form
    13,251/19,877.20 = 3,390.37/x
  3. Step 3: Cross multiply
    13,251x = 19,877.20 × 3,390.37
  4. Step 4: Simplify right side
    13,251x = 67,391,062.56
  5. Step 5: Solve for x
    x = 67,391,062.56/13,251
  6. Step 6: Final answer
    x = 5,085.73

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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.