Home / 11,421.21-17,129.72-5,179.71

Finding the Fourth Proportional to 11,421.21, 17,129.72 and 5,179.71

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Solution

The fourth proportional to 11,421.21, 17,129.72 and 5,179.71 is: 7,768.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.21 : 17,129.72 = 5,179.71 : x
  2. Step 2: Convert to fraction form
    11,421.21/17,129.72 = 5,179.71/x
  3. Step 3: Cross multiply
    11,421.21x = 17,129.72 × 5,179.71
  4. Step 4: Simplify right side
    11,421.21x = 88,726,981.98
  5. Step 5: Solve for x
    x = 88,726,981.98/11,421.21
  6. Step 6: Final answer
    x = 7,768.61

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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.