Home / 20,738.76-31,107.87-5,156.52

Finding the Fourth Proportional to 20,738.76, 31,107.87 and 5,156.52

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Solution

The fourth proportional to 20,738.76, 31,107.87 and 5,156.52 is: 7,734.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.76 : 31,107.87 = 5,156.52 : x
  2. Step 2: Convert to fraction form
    20,738.76/31,107.87 = 5,156.52/x
  3. Step 3: Cross multiply
    20,738.76x = 31,107.87 × 5,156.52
  4. Step 4: Simplify right side
    20,738.76x = 160,408,353.81
  5. Step 5: Solve for x
    x = 160,408,353.81/20,738.76
  6. Step 6: Final answer
    x = 7,734.71

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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.