Home / 11,121.90-16,662.60-8,797.20

Finding the Fourth Proportional to 11,121.90, 16,662.60 and 8,797.20

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Solution

The fourth proportional to 11,121.90, 16,662.60 and 8,797.20 is: 13,179.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.90 : 16,662.60 = 8,797.20 : x
  2. Step 2: Convert to fraction form
    11,121.90/16,662.60 = 8,797.20/x
  3. Step 3: Cross multiply
    11,121.90x = 16,662.60 × 8,797.20
  4. Step 4: Simplify right side
    11,121.90x = 146,584,224.72
  5. Step 5: Solve for x
    x = 146,584,224.72/11,121.90
  6. Step 6: Final answer
    x = 13,179.78

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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.