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Finding the Fourth Proportional to 20,611.58, 30,913.87 and 5,817.03

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Solution

The fourth proportional to 20,611.58, 30,913.87 and 5,817.03 is: 8,724.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.58 : 30,913.87 = 5,817.03 : x
  2. Step 2: Convert to fraction form
    20,611.58/30,913.87 = 5,817.03/x
  3. Step 3: Cross multiply
    20,611.58x = 30,913.87 × 5,817.03
  4. Step 4: Simplify right side
    20,611.58x = 179,826,923.75
  5. Step 5: Solve for x
    x = 179,826,923.75/20,611.58
  6. Step 6: Final answer
    x = 8,724.56

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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.