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Finding the Fourth Proportional to 7,990.76, 11,991.47 and 2,796.63

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Solution

The fourth proportional to 7,990.76, 11,991.47 and 2,796.63 is: 4,196.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.76 : 11,991.47 = 2,796.63 : x
  2. Step 2: Convert to fraction form
    7,990.76/11,991.47 = 2,796.63/x
  3. Step 3: Cross multiply
    7,990.76x = 11,991.47 × 2,796.63
  4. Step 4: Simplify right side
    7,990.76x = 33,535,690.76
  5. Step 5: Solve for x
    x = 33,535,690.76/7,990.76
  6. Step 6: Final answer
    x = 4,196.81

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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.