Home / 20,835.75-31,255.22-8,989.80

Finding the Fourth Proportional to 20,835.75, 31,255.22 and 8,989.80

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Solution

The fourth proportional to 20,835.75, 31,255.22 and 8,989.80 is: 13,485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.75 : 31,255.22 = 8,989.80 : x
  2. Step 2: Convert to fraction form
    20,835.75/31,255.22 = 8,989.80/x
  3. Step 3: Cross multiply
    20,835.75x = 31,255.22 × 8,989.80
  4. Step 4: Simplify right side
    20,835.75x = 280,978,207.27
  5. Step 5: Solve for x
    x = 280,978,207.27/20,835.75
  6. Step 6: Final answer
    x = 13,485.39

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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.