Home / 13,920.13-20,879.78-5,154.85

Finding the Fourth Proportional to 13,920.13, 20,879.78 and 5,154.85

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Solution

The fourth proportional to 13,920.13, 20,879.78 and 5,154.85 is: 7,732.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.13 : 20,879.78 = 5,154.85 : x
  2. Step 2: Convert to fraction form
    13,920.13/20,879.78 = 5,154.85/x
  3. Step 3: Cross multiply
    13,920.13x = 20,879.78 × 5,154.85
  4. Step 4: Simplify right side
    13,920.13x = 107,632,029.53
  5. Step 5: Solve for x
    x = 107,632,029.53/13,920.13
  6. Step 6: Final answer
    x = 7,732.12

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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.