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Finding the Fourth Proportional to 20,134.20, 30,201.30 and 12,714.60

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Solution

The fourth proportional to 20,134.20, 30,201.30 and 12,714.60 is: 19,071.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,134.20 : 30,201.30 = 12,714.60 : x
  2. Step 2: Convert to fraction form
    20,134.20/30,201.30 = 12,714.60/x
  3. Step 3: Cross multiply
    20,134.20x = 30,201.30 × 12,714.60
  4. Step 4: Simplify right side
    20,134.20x = 383,997,448.98
  5. Step 5: Solve for x
    x = 383,997,448.98/20,134.20
  6. Step 6: Final answer
    x = 19,071.90

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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.