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Finding the Fourth Proportional to 7,191.86, 10,786.16 and 1,998.14

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Solution

The fourth proportional to 7,191.86, 10,786.16 and 1,998.14 is: 2,996.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.86 : 10,786.16 = 1,998.14 : x
  2. Step 2: Convert to fraction form
    7,191.86/10,786.16 = 1,998.14/x
  3. Step 3: Cross multiply
    7,191.86x = 10,786.16 × 1,998.14
  4. Step 4: Simplify right side
    7,191.86x = 21,552,193.82
  5. Step 5: Solve for x
    x = 21,552,193.82/7,191.86
  6. Step 6: Final answer
    x = 2,996.75

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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.