Home / 13,857.12-20,785.72-3,468.86

Finding the Fourth Proportional to 13,857.12, 20,785.72 and 3,468.86

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Solution

The fourth proportional to 13,857.12, 20,785.72 and 3,468.86 is: 5,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.12 : 20,785.72 = 3,468.86 : x
  2. Step 2: Convert to fraction form
    13,857.12/20,785.72 = 3,468.86/x
  3. Step 3: Cross multiply
    13,857.12x = 20,785.72 × 3,468.86
  4. Step 4: Simplify right side
    13,857.12x = 72,102,752.68
  5. Step 5: Solve for x
    x = 72,102,752.68/13,857.12
  6. Step 6: Final answer
    x = 5,203.30

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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.