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Finding the Fourth Proportional to 8,885.32, 12,236.81 and 8,691.55

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Solution

The fourth proportional to 8,885.32, 12,236.81 and 8,691.55 is: 11,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885.32 : 12,236.81 = 8,691.55 : x
  2. Step 2: Convert to fraction form
    8,885.32/12,236.81 = 8,691.55/x
  3. Step 3: Cross multiply
    8,885.32x = 12,236.81 × 8,691.55
  4. Step 4: Simplify right side
    8,885.32x = 106,356,771.91
  5. Step 5: Solve for x
    x = 106,356,771.91/8,885.32
  6. Step 6: Final answer
    x = 11,969.95

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Double scale
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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.