Home / 20,429.96-30,579.20-13,819.73

Finding the Fourth Proportional to 20,429.96, 30,579.20 and 13,819.73

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Solution

The fourth proportional to 20,429.96, 30,579.20 and 13,819.73 is: 20,685.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.96 : 30,579.20 = 13,819.73 : x
  2. Step 2: Convert to fraction form
    20,429.96/30,579.20 = 13,819.73/x
  3. Step 3: Cross multiply
    20,429.96x = 30,579.20 × 13,819.73
  4. Step 4: Simplify right side
    20,429.96x = 422,596,218.52
  5. Step 5: Solve for x
    x = 422,596,218.52/20,429.96
  6. Step 6: Final answer
    x = 20,685.12

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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.