Home / 11,155.20-15,391.36-6,680.64

Finding the Fourth Proportional to 11,155.20, 15,391.36 and 6,680.64

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Solution

The fourth proportional to 11,155.20, 15,391.36 and 6,680.64 is: 9,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155.20 : 15,391.36 = 6,680.64 : x
  2. Step 2: Convert to fraction form
    11,155.20/15,391.36 = 6,680.64/x
  3. Step 3: Cross multiply
    11,155.20x = 15,391.36 × 6,680.64
  4. Step 4: Simplify right side
    11,155.20x = 102,824,135.27
  5. Step 5: Solve for x
    x = 102,824,135.27/11,155.20
  6. Step 6: Final answer
    x = 9,217.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.