Home / 13,620.38-18,797.65-8,245.78

Finding the Fourth Proportional to 13,620.38, 18,797.65 and 8,245.78

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Solution

The fourth proportional to 13,620.38, 18,797.65 and 8,245.78 is: 11,380.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.38 : 18,797.65 = 8,245.78 : x
  2. Step 2: Convert to fraction form
    13,620.38/18,797.65 = 8,245.78/x
  3. Step 3: Cross multiply
    13,620.38x = 18,797.65 × 8,245.78
  4. Step 4: Simplify right side
    13,620.38x = 155,001,185.00
  5. Step 5: Solve for x
    x = 155,001,185.00/13,620.38
  6. Step 6: Final answer
    x = 11,380.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.