Home / 13,789.37-20,687.29-3,928.79

Finding the Fourth Proportional to 13,789.37, 20,687.29 and 3,928.79

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Solution

The fourth proportional to 13,789.37, 20,687.29 and 3,928.79 is: 5,894.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.37 : 20,687.29 = 3,928.79 : x
  2. Step 2: Convert to fraction form
    13,789.37/20,687.29 = 3,928.79/x
  3. Step 3: Cross multiply
    13,789.37x = 20,687.29 × 3,928.79
  4. Step 4: Simplify right side
    13,789.37x = 81,276,018.08
  5. Step 5: Solve for x
    x = 81,276,018.08/13,789.37
  6. Step 6: Final answer
    x = 5,894.11

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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.