Home / 13,928.80-20,901.38-5,169.80

Finding the Fourth Proportional to 13,928.80, 20,901.38 and 5,169.80

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Solution

The fourth proportional to 13,928.80, 20,901.38 and 5,169.80 is: 7,757.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.80 : 20,901.38 = 5,169.80 : x
  2. Step 2: Convert to fraction form
    13,928.80/20,901.38 = 5,169.80/x
  3. Step 3: Cross multiply
    13,928.80x = 20,901.38 × 5,169.80
  4. Step 4: Simplify right side
    13,928.80x = 108,055,954.32
  5. Step 5: Solve for x
    x = 108,055,954.32/13,928.80
  6. Step 6: Final answer
    x = 7,757.74

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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.