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Finding the Fourth Proportional to 20,392.45, 30,568.02 and 13,819.30

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Solution

The fourth proportional to 20,392.45, 30,568.02 and 13,819.30 is: 20,714.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.45 : 30,568.02 = 13,819.30 : x
  2. Step 2: Convert to fraction form
    20,392.45/30,568.02 = 13,819.30/x
  3. Step 3: Cross multiply
    20,392.45x = 30,568.02 × 13,819.30
  4. Step 4: Simplify right side
    20,392.45x = 422,428,638.79
  5. Step 5: Solve for x
    x = 422,428,638.79/20,392.45
  6. Step 6: Final answer
    x = 20,714.95

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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.