Home / 8,615.28-11,885.84-5,255.76

Finding the Fourth Proportional to 8,615.28, 11,885.84 and 5,255.76

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Solution

The fourth proportional to 8,615.28, 11,885.84 and 5,255.76 is: 7,250.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.28 : 11,885.84 = 5,255.76 : x
  2. Step 2: Convert to fraction form
    8,615.28/11,885.84 = 5,255.76/x
  3. Step 3: Cross multiply
    8,615.28x = 11,885.84 × 5,255.76
  4. Step 4: Simplify right side
    8,615.28x = 62,469,122.44
  5. Step 5: Solve for x
    x = 62,469,122.44/8,615.28
  6. Step 6: Final answer
    x = 7,250.97

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Half scale
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Double scale
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Similar ratio
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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.