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Finding the Fourth Proportional to 11,005.70, 16,508.55 and 8,381.30

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Solution

The fourth proportional to 11,005.70, 16,508.55 and 8,381.30 is: 12,571.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,005.70 : 16,508.55 = 8,381.30 : x
  2. Step 2: Convert to fraction form
    11,005.70/16,508.55 = 8,381.30/x
  3. Step 3: Cross multiply
    11,005.70x = 16,508.55 × 8,381.30
  4. Step 4: Simplify right side
    11,005.70x = 138,363,110.12
  5. Step 5: Solve for x
    x = 138,363,110.12/11,005.70
  6. Step 6: Final answer
    x = 12,571.95

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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.