Home / 20,615.72-30,902.83-8,144.60

Finding the Fourth Proportional to 20,615.72, 30,902.83 and 8,144.60

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Solution

The fourth proportional to 20,615.72, 30,902.83 and 8,144.60 is: 12,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.72 : 30,902.83 = 8,144.60 : x
  2. Step 2: Convert to fraction form
    20,615.72/30,902.83 = 8,144.60/x
  3. Step 3: Cross multiply
    20,615.72x = 30,902.83 × 8,144.60
  4. Step 4: Simplify right side
    20,615.72x = 251,691,014.34
  5. Step 5: Solve for x
    x = 251,691,014.34/20,615.72
  6. Step 6: Final answer
    x = 12,208.70

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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.