Home / 20,664.37-30,989.05-8,819.40

Finding the Fourth Proportional to 20,664.37, 30,989.05 and 8,819.40

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Solution

The fourth proportional to 20,664.37, 30,989.05 and 8,819.40 is: 13,225.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.37 : 30,989.05 = 8,819.40 : x
  2. Step 2: Convert to fraction form
    20,664.37/30,989.05 = 8,819.40/x
  3. Step 3: Cross multiply
    20,664.37x = 30,989.05 × 8,819.40
  4. Step 4: Simplify right side
    20,664.37x = 273,304,827.57
  5. Step 5: Solve for x
    x = 273,304,827.57/20,664.37
  6. Step 6: Final answer
    x = 13,225.90

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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.