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Finding the Fourth Proportional to 10,992.60, 16,488.90 and 10,190.70

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Solution

The fourth proportional to 10,992.60, 16,488.90 and 10,190.70 is: 15,286.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,992.60 : 16,488.90 = 10,190.70 : x
  2. Step 2: Convert to fraction form
    10,992.60/16,488.90 = 10,190.70/x
  3. Step 3: Cross multiply
    10,992.60x = 16,488.90 × 10,190.70
  4. Step 4: Simplify right side
    10,992.60x = 168,033,433.23
  5. Step 5: Solve for x
    x = 168,033,433.23/10,992.60
  6. Step 6: Final answer
    x = 15,286.05

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.