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Finding the Fourth Proportional to 11,186.70, 16,780.05 and 8,999.70

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Solution

The fourth proportional to 11,186.70, 16,780.05 and 8,999.70 is: 13,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,186.70 : 16,780.05 = 8,999.70 : x
  2. Step 2: Convert to fraction form
    11,186.70/16,780.05 = 8,999.70/x
  3. Step 3: Cross multiply
    11,186.70x = 16,780.05 × 8,999.70
  4. Step 4: Simplify right side
    11,186.70x = 151,015,415.99
  5. Step 5: Solve for x
    x = 151,015,415.99/11,186.70
  6. Step 6: Final answer
    x = 13,499.55

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