Home / 20,722.04-31,074.20-7,890.80

Finding the Fourth Proportional to 20,722.04, 31,074.20 and 7,890.80

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Solution

The fourth proportional to 20,722.04, 31,074.20 and 7,890.80 is: 11,832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.04 : 31,074.20 = 7,890.80 : x
  2. Step 2: Convert to fraction form
    20,722.04/31,074.20 = 7,890.80/x
  3. Step 3: Cross multiply
    20,722.04x = 31,074.20 × 7,890.80
  4. Step 4: Simplify right side
    20,722.04x = 245,200,297.36
  5. Step 5: Solve for x
    x = 245,200,297.36/20,722.04
  6. Step 6: Final answer
    x = 11,832.83

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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.