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Finding the Fourth Proportional to 20,506.60, 30,738.30 and 8,021.80

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Solution

The fourth proportional to 20,506.60, 30,738.30 and 8,021.80 is: 12,024.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.60 : 30,738.30 = 8,021.80 : x
  2. Step 2: Convert to fraction form
    20,506.60/30,738.30 = 8,021.80/x
  3. Step 3: Cross multiply
    20,506.60x = 30,738.30 × 8,021.80
  4. Step 4: Simplify right side
    20,506.60x = 246,576,494.94
  5. Step 5: Solve for x
    x = 246,576,494.94/20,506.60
  6. Step 6: Final answer
    x = 12,024.25

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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.