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Finding the Fourth Proportional to 20,203.78, 30,311.97 and 10,349.98

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Solution

The fourth proportional to 20,203.78, 30,311.97 and 10,349.98 is: 15,528.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,203.78 : 30,311.97 = 10,349.98 : x
  2. Step 2: Convert to fraction form
    20,203.78/30,311.97 = 10,349.98/x
  3. Step 3: Cross multiply
    20,203.78x = 30,311.97 × 10,349.98
  4. Step 4: Simplify right side
    20,203.78x = 313,728,226.89
  5. Step 5: Solve for x
    x = 313,728,226.89/20,203.78
  6. Step 6: Final answer
    x = 15,528.20

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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.