Home / 18,327.21-27,469.78-7,781.77

Finding the Fourth Proportional to 18,327.21, 27,469.78 and 7,781.77

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Solution

The fourth proportional to 18,327.21, 27,469.78 and 7,781.77 is: 11,663.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,327.21 : 27,469.78 = 7,781.77 : x
  2. Step 2: Convert to fraction form
    18,327.21/27,469.78 = 7,781.77/x
  3. Step 3: Cross multiply
    18,327.21x = 27,469.78 × 7,781.77
  4. Step 4: Simplify right side
    18,327.21x = 213,763,568.57
  5. Step 5: Solve for x
    x = 213,763,568.57/18,327.21
  6. Step 6: Final answer
    x = 11,663.73

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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.