Home / 20,664.87-30,989.81-8,819.91

Finding the Fourth Proportional to 20,664.87, 30,989.81 and 8,819.91

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Solution

The fourth proportional to 20,664.87, 30,989.81 and 8,819.91 is: 13,226.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.87 : 30,989.81 = 8,819.91 : x
  2. Step 2: Convert to fraction form
    20,664.87/30,989.81 = 8,819.91/x
  3. Step 3: Cross multiply
    20,664.87x = 30,989.81 × 8,819.91
  4. Step 4: Simplify right side
    20,664.87x = 273,327,291.02
  5. Step 5: Solve for x
    x = 273,327,291.02/20,664.87
  6. Step 6: Final answer
    x = 13,226.66

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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.