Home / 18,704.48-25,815-11,997.68

Finding the Fourth Proportional to 18,704.48, 25,815 and 11,997.68

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Solution

The fourth proportional to 18,704.48, 25,815 and 11,997.68 is: 16,558.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.48 : 25,815 = 11,997.68 : x
  2. Step 2: Convert to fraction form
    18,704.48/25,815 = 11,997.68/x
  3. Step 3: Cross multiply
    18,704.48x = 25,815 × 11,997.68
  4. Step 4: Simplify right side
    18,704.48x = 309,720,109.20
  5. Step 5: Solve for x
    x = 309,720,109.20/18,704.48
  6. Step 6: Final answer
    x = 16,558.61

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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.