Home / 18,945.34-28,383.96-11,149.90

Finding the Fourth Proportional to 18,945.34, 28,383.96 and 11,149.90

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Solution

The fourth proportional to 18,945.34, 28,383.96 and 11,149.90 is: 16,704.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,945.34 : 28,383.96 = 11,149.90 : x
  2. Step 2: Convert to fraction form
    18,945.34/28,383.96 = 11,149.90/x
  3. Step 3: Cross multiply
    18,945.34x = 28,383.96 × 11,149.90
  4. Step 4: Simplify right side
    18,945.34x = 316,478,315.60
  5. Step 5: Solve for x
    x = 316,478,315.60/18,945.34
  6. Step 6: Final answer
    x = 16,704.81

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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.