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Finding the Fourth Proportional to 20,611.54, 30,919.77 and 7,281.77

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Solution

The fourth proportional to 20,611.54, 30,919.77 and 7,281.77 is: 10,923.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.54 : 30,919.77 = 7,281.77 : x
  2. Step 2: Convert to fraction form
    20,611.54/30,919.77 = 7,281.77/x
  3. Step 3: Cross multiply
    20,611.54x = 30,919.77 × 7,281.77
  4. Step 4: Simplify right side
    20,611.54x = 225,150,730.89
  5. Step 5: Solve for x
    x = 225,150,730.89/20,611.54
  6. Step 6: Final answer
    x = 10,923.53

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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.