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Finding the Fourth Proportional to 20,491.60, 30,737.40 and 20,163.55

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Solution

The fourth proportional to 20,491.60, 30,737.40 and 20,163.55 is: 30,245.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.60 : 30,737.40 = 20,163.55 : x
  2. Step 2: Convert to fraction form
    20,491.60/30,737.40 = 20,163.55/x
  3. Step 3: Cross multiply
    20,491.60x = 30,737.40 × 20,163.55
  4. Step 4: Simplify right side
    20,491.60x = 619,775,101.77
  5. Step 5: Solve for x
    x = 619,775,101.77/20,491.60
  6. Step 6: Final answer
    x = 30,245.33

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Similar ratio
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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.