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Finding the Fourth Proportional to 11,991.68, 17,996.76 and 7,830.56

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Solution

The fourth proportional to 11,991.68, 17,996.76 and 7,830.56 is: 11,751.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.68 : 17,996.76 = 7,830.56 : x
  2. Step 2: Convert to fraction form
    11,991.68/17,996.76 = 7,830.56/x
  3. Step 3: Cross multiply
    11,991.68x = 17,996.76 × 7,830.56
  4. Step 4: Simplify right side
    11,991.68x = 140,924,708.99
  5. Step 5: Solve for x
    x = 140,924,708.99/11,991.68
  6. Step 6: Final answer
    x = 11,751.87

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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.