Home / 20,738.28-31,107.39-5,155.91

Finding the Fourth Proportional to 20,738.28, 31,107.39 and 5,155.91

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Solution

The fourth proportional to 20,738.28, 31,107.39 and 5,155.91 is: 7,733.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.28 : 31,107.39 = 5,155.91 : x
  2. Step 2: Convert to fraction form
    20,738.28/31,107.39 = 5,155.91/x
  3. Step 3: Cross multiply
    20,738.28x = 31,107.39 × 5,155.91
  4. Step 4: Simplify right side
    20,738.28x = 160,386,747.64
  5. Step 5: Solve for x
    x = 160,386,747.64/20,738.28
  6. Step 6: Final answer
    x = 7,733.85

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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.