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Finding the Fourth Proportional to 20,372.20, 30,563.70 and 7,223.20

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Solution

The fourth proportional to 20,372.20, 30,563.70 and 7,223.20 is: 10,836.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.20 : 30,563.70 = 7,223.20 : x
  2. Step 2: Convert to fraction form
    20,372.20/30,563.70 = 7,223.20/x
  3. Step 3: Cross multiply
    20,372.20x = 30,563.70 × 7,223.20
  4. Step 4: Simplify right side
    20,372.20x = 220,767,717.84
  5. Step 5: Solve for x
    x = 220,767,717.84/20,372.20
  6. Step 6: Final answer
    x = 10,836.71

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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.