Home / 18,961.99-28,439.75-5,107.75

Finding the Fourth Proportional to 18,961.99, 28,439.75 and 5,107.75

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Solution

The fourth proportional to 18,961.99, 28,439.75 and 5,107.75 is: 7,660.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.99 : 28,439.75 = 5,107.75 : x
  2. Step 2: Convert to fraction form
    18,961.99/28,439.75 = 5,107.75/x
  3. Step 3: Cross multiply
    18,961.99x = 28,439.75 × 5,107.75
  4. Step 4: Simplify right side
    18,961.99x = 145,263,107.52
  5. Step 5: Solve for x
    x = 145,263,107.52/18,961.99
  6. Step 6: Final answer
    x = 7,660.75

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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.