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Finding the Fourth Proportional to 20,644.92, 30,956.45 and 8,164.44

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Solution

The fourth proportional to 20,644.92, 30,956.45 and 8,164.44 is: 12,242.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.92 : 30,956.45 = 8,164.44 : x
  2. Step 2: Convert to fraction form
    20,644.92/30,956.45 = 8,164.44/x
  3. Step 3: Cross multiply
    20,644.92x = 30,956.45 × 8,164.44
  4. Step 4: Simplify right side
    20,644.92x = 252,742,037.82
  5. Step 5: Solve for x
    x = 252,742,037.82/20,644.92
  6. Step 6: Final answer
    x = 12,242.34

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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.