Home / 7,972.28-11,958.78-2,778.56

Finding the Fourth Proportional to 7,972.28, 11,958.78 and 2,778.56

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Solution

The fourth proportional to 7,972.28, 11,958.78 and 2,778.56 is: 4,167.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.28 : 11,958.78 = 2,778.56 : x
  2. Step 2: Convert to fraction form
    7,972.28/11,958.78 = 2,778.56/x
  3. Step 3: Cross multiply
    7,972.28x = 11,958.78 × 2,778.56
  4. Step 4: Simplify right side
    7,972.28x = 33,228,187.76
  5. Step 5: Solve for x
    x = 33,228,187.76/7,972.28
  6. Step 6: Final answer
    x = 4,167.97

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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.