Home / 20,112.60-30,149.70-15,667.80

Finding the Fourth Proportional to 20,112.60, 30,149.70 and 15,667.80

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Solution

The fourth proportional to 20,112.60, 30,149.70 and 15,667.80 is: 23,486.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.60 : 30,149.70 = 15,667.80 : x
  2. Step 2: Convert to fraction form
    20,112.60/30,149.70 = 15,667.80/x
  3. Step 3: Cross multiply
    20,112.60x = 30,149.70 × 15,667.80
  4. Step 4: Simplify right side
    20,112.60x = 472,379,469.66
  5. Step 5: Solve for x
    x = 472,379,469.66/20,112.60
  6. Step 6: Final answer
    x = 23,486.74

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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.