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Finding the Fourth Proportional to 13,103.91, 18,086.90 and 8,068.95

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Solution

The fourth proportional to 13,103.91, 18,086.90 and 8,068.95 is: 11,137.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,103.91 : 18,086.90 = 8,068.95 : x
  2. Step 2: Convert to fraction form
    13,103.91/18,086.90 = 8,068.95/x
  3. Step 3: Cross multiply
    13,103.91x = 18,086.90 × 8,068.95
  4. Step 4: Simplify right side
    13,103.91x = 145,942,251.41
  5. Step 5: Solve for x
    x = 145,942,251.41/13,103.91
  6. Step 6: Final answer
    x = 11,137.31

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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.