Home / 6,905.20-9,529.56-3,919.92

Finding the Fourth Proportional to 6,905.20, 9,529.56 and 3,919.92

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Solution

The fourth proportional to 6,905.20, 9,529.56 and 3,919.92 is: 5,409.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,905.20 : 9,529.56 = 3,919.92 : x
  2. Step 2: Convert to fraction form
    6,905.20/9,529.56 = 3,919.92/x
  3. Step 3: Cross multiply
    6,905.20x = 9,529.56 × 3,919.92
  4. Step 4: Simplify right side
    6,905.20x = 37,355,112.84
  5. Step 5: Solve for x
    x = 37,355,112.84/6,905.20
  6. Step 6: Final answer
    x = 5,409.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.