Home / 8,105.51-12,138.66-6,708.56

Finding the Fourth Proportional to 8,105.51, 12,138.66 and 6,708.56

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Solution

The fourth proportional to 8,105.51, 12,138.66 and 6,708.56 is: 10,046.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,105.51 : 12,138.66 = 6,708.56 : x
  2. Step 2: Convert to fraction form
    8,105.51/12,138.66 = 6,708.56/x
  3. Step 3: Cross multiply
    8,105.51x = 12,138.66 × 6,708.56
  4. Step 4: Simplify right side
    8,105.51x = 81,432,928.93
  5. Step 5: Solve for x
    x = 81,432,928.93/8,105.51
  6. Step 6: Final answer
    x = 10,046.61

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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.