Home / 8,128.68-12,190.60-3,448.62

Finding the Fourth Proportional to 8,128.68, 12,190.60 and 3,448.62

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Solution

The fourth proportional to 8,128.68, 12,190.60 and 3,448.62 is: 5,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.68 : 12,190.60 = 3,448.62 : x
  2. Step 2: Convert to fraction form
    8,128.68/12,190.60 = 3,448.62/x
  3. Step 3: Cross multiply
    8,128.68x = 12,190.60 × 3,448.62
  4. Step 4: Simplify right side
    8,128.68x = 42,040,746.97
  5. Step 5: Solve for x
    x = 42,040,746.97/8,128.68
  6. Step 6: Final answer
    x = 5,171.90

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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.