Home / 13,857.25-20,785.88-5,540.98

Finding the Fourth Proportional to 13,857.25, 20,785.88 and 5,540.98

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Solution

The fourth proportional to 13,857.25, 20,785.88 and 5,540.98 is: 8,311.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.25 : 20,785.88 = 5,540.98 : x
  2. Step 2: Convert to fraction form
    13,857.25/20,785.88 = 5,540.98/x
  3. Step 3: Cross multiply
    13,857.25x = 20,785.88 × 5,540.98
  4. Step 4: Simplify right side
    13,857.25x = 115,174,145.36
  5. Step 5: Solve for x
    x = 115,174,145.36/13,857.25
  6. Step 6: Final answer
    x = 8,311.47

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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.