Home / 13,945.72-20,919.84-5,177.92

Finding the Fourth Proportional to 13,945.72, 20,919.84 and 5,177.92

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Solution

The fourth proportional to 13,945.72, 20,919.84 and 5,177.92 is: 7,767.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,945.72 : 20,919.84 = 5,177.92 : x
  2. Step 2: Convert to fraction form
    13,945.72/20,919.84 = 5,177.92/x
  3. Step 3: Cross multiply
    13,945.72x = 20,919.84 × 5,177.92
  4. Step 4: Simplify right side
    13,945.72x = 108,321,257.93
  5. Step 5: Solve for x
    x = 108,321,257.93/13,945.72
  6. Step 6: Final answer
    x = 7,767.35

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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.