Home / 10,103.45-15,155.57-5,171.76

Finding the Fourth Proportional to 10,103.45, 15,155.57 and 5,171.76

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Solution

The fourth proportional to 10,103.45, 15,155.57 and 5,171.76 is: 7,757.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,103.45 : 15,155.57 = 5,171.76 : x
  2. Step 2: Convert to fraction form
    10,103.45/15,155.57 = 5,171.76/x
  3. Step 3: Cross multiply
    10,103.45x = 15,155.57 × 5,171.76
  4. Step 4: Simplify right side
    10,103.45x = 78,380,983.63
  5. Step 5: Solve for x
    x = 78,380,983.63/10,103.45
  6. Step 6: Final answer
    x = 7,757.85

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1.5x scale

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.