Home / 20,317.60-30,481.37-6,990.80

Finding the Fourth Proportional to 20,317.60, 30,481.37 and 6,990.80

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Solution

The fourth proportional to 20,317.60, 30,481.37 and 6,990.80 is: 10,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.60 : 30,481.37 = 6,990.80 : x
  2. Step 2: Convert to fraction form
    20,317.60/30,481.37 = 6,990.80/x
  3. Step 3: Cross multiply
    20,317.60x = 30,481.37 × 6,990.80
  4. Step 4: Simplify right side
    20,317.60x = 213,089,161.40
  5. Step 5: Solve for x
    x = 213,089,161.40/20,317.60
  6. Step 6: Final answer
    x = 10,487.91

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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.