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Finding the Fourth Proportional to 20,602.62, 30,905.46 and 5,612.31

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Solution

The fourth proportional to 20,602.62, 30,905.46 and 5,612.31 is: 8,418.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.62 : 30,905.46 = 5,612.31 : x
  2. Step 2: Convert to fraction form
    20,602.62/30,905.46 = 5,612.31/x
  3. Step 3: Cross multiply
    20,602.62x = 30,905.46 × 5,612.31
  4. Step 4: Simplify right side
    20,602.62x = 173,451,022.21
  5. Step 5: Solve for x
    x = 173,451,022.21/20,602.62
  6. Step 6: Final answer
    x = 8,418.88

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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.