Home / 13,520.36-20,280.78-5,727.72

Finding the Fourth Proportional to 13,520.36, 20,280.78 and 5,727.72

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Solution

The fourth proportional to 13,520.36, 20,280.78 and 5,727.72 is: 8,591.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.36 : 20,280.78 = 5,727.72 : x
  2. Step 2: Convert to fraction form
    13,520.36/20,280.78 = 5,727.72/x
  3. Step 3: Cross multiply
    13,520.36x = 20,280.78 × 5,727.72
  4. Step 4: Simplify right side
    13,520.36x = 116,162,629.22
  5. Step 5: Solve for x
    x = 116,162,629.22/13,520.36
  6. Step 6: Final answer
    x = 8,591.68

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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.