Home / 8,105.22-12,138.70-5,174.64

Finding the Fourth Proportional to 8,105.22, 12,138.70 and 5,174.64

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Solution

The fourth proportional to 8,105.22, 12,138.70 and 5,174.64 is: 7,749.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,105.22 : 12,138.70 = 5,174.64 : x
  2. Step 2: Convert to fraction form
    8,105.22/12,138.70 = 5,174.64/x
  3. Step 3: Cross multiply
    8,105.22x = 12,138.70 × 5,174.64
  4. Step 4: Simplify right side
    8,105.22x = 62,813,402.57
  5. Step 5: Solve for x
    x = 62,813,402.57/8,105.22
  6. Step 6: Final answer
    x = 7,749.75

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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.