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Finding the Fourth Proportional to 20,410.58, 30,611.22 and 5,620.79

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Solution

The fourth proportional to 20,410.58, 30,611.22 and 5,620.79 is: 8,429.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.58 : 30,611.22 = 5,620.79 : x
  2. Step 2: Convert to fraction form
    20,410.58/30,611.22 = 5,620.79/x
  3. Step 3: Cross multiply
    20,410.58x = 30,611.22 × 5,620.79
  4. Step 4: Simplify right side
    20,410.58x = 172,059,294.71
  5. Step 5: Solve for x
    x = 172,059,294.71/20,410.58
  6. Step 6: Final answer
    x = 8,429.91

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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.