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Finding the Fourth Proportional to 7,191.96, 10,788.64 and 1,997.80

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Solution

The fourth proportional to 7,191.96, 10,788.64 and 1,997.80 is: 2,996.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.96 : 10,788.64 = 1,997.80 : x
  2. Step 2: Convert to fraction form
    7,191.96/10,788.64 = 1,997.80/x
  3. Step 3: Cross multiply
    7,191.96x = 10,788.64 × 1,997.80
  4. Step 4: Simplify right side
    7,191.96x = 21,553,544.99
  5. Step 5: Solve for x
    x = 21,553,544.99/7,191.96
  6. Step 6: Final answer
    x = 2,996.89

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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.