Home / 11,778.21-17,660.66-3,878.60

Finding the Fourth Proportional to 11,778.21, 17,660.66 and 3,878.60

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Solution

The fourth proportional to 11,778.21, 17,660.66 and 3,878.60 is: 5,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,778.21 : 17,660.66 = 3,878.60 : x
  2. Step 2: Convert to fraction form
    11,778.21/17,660.66 = 3,878.60/x
  3. Step 3: Cross multiply
    11,778.21x = 17,660.66 × 3,878.60
  4. Step 4: Simplify right side
    11,778.21x = 68,498,528.18
  5. Step 5: Solve for x
    x = 68,498,528.18/11,778.21
  6. Step 6: Final answer
    x = 5,815.70

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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.