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Finding the Fourth Proportional to 11,007.70, 16,511.55 and 10,861.90

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Solution

The fourth proportional to 11,007.70, 16,511.55 and 10,861.90 is: 16,292.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,007.70 : 16,511.55 = 10,861.90 : x
  2. Step 2: Convert to fraction form
    11,007.70/16,511.55 = 10,861.90/x
  3. Step 3: Cross multiply
    11,007.70x = 16,511.55 × 10,861.90
  4. Step 4: Simplify right side
    11,007.70x = 179,346,804.95
  5. Step 5: Solve for x
    x = 179,346,804.95/11,007.70
  6. Step 6: Final answer
    x = 16,292.85

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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.