Home / 7,191.28-10,786.92-1,997.20

Finding the Fourth Proportional to 7,191.28, 10,786.92 and 1,997.20

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Solution

The fourth proportional to 7,191.28, 10,786.92 and 1,997.20 is: 2,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.28 : 10,786.92 = 1,997.20 : x
  2. Step 2: Convert to fraction form
    7,191.28/10,786.92 = 1,997.20/x
  3. Step 3: Cross multiply
    7,191.28x = 10,786.92 × 1,997.20
  4. Step 4: Simplify right side
    7,191.28x = 21,543,636.62
  5. Step 5: Solve for x
    x = 21,543,636.62/7,191.28
  6. Step 6: Final answer
    x = 2,995.80

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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.