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Finding the Fourth Proportional to 20,554.43, 30,819.68 and 8,059.81

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Solution

The fourth proportional to 20,554.43, 30,819.68 and 8,059.81 is: 12,085.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.43 : 30,819.68 = 8,059.81 : x
  2. Step 2: Convert to fraction form
    20,554.43/30,819.68 = 8,059.81/x
  3. Step 3: Cross multiply
    20,554.43x = 30,819.68 × 8,059.81
  4. Step 4: Simplify right side
    20,554.43x = 248,400,785.21
  5. Step 5: Solve for x
    x = 248,400,785.21/20,554.43
  6. Step 6: Final answer
    x = 12,085.02

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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.