Home / 9,078.40-13,617.60-8,859.70

Finding the Fourth Proportional to 9,078.40, 13,617.60 and 8,859.70

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Solution

The fourth proportional to 9,078.40, 13,617.60 and 8,859.70 is: 13,289.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,078.40 : 13,617.60 = 8,859.70 : x
  2. Step 2: Convert to fraction form
    9,078.40/13,617.60 = 8,859.70/x
  3. Step 3: Cross multiply
    9,078.40x = 13,617.60 × 8,859.70
  4. Step 4: Simplify right side
    9,078.40x = 120,647,850.72
  5. Step 5: Solve for x
    x = 120,647,850.72/9,078.40
  6. Step 6: Final answer
    x = 13,289.55

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Similar ratio
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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.