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Finding the Fourth Proportional to 20,183.58, 30,285.90 and 11,435.58

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Solution

The fourth proportional to 20,183.58, 30,285.90 and 11,435.58 is: 17,159.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,183.58 : 30,285.90 = 11,435.58 : x
  2. Step 2: Convert to fraction form
    20,183.58/30,285.90 = 11,435.58/x
  3. Step 3: Cross multiply
    20,183.58x = 30,285.90 × 11,435.58
  4. Step 4: Simplify right side
    20,183.58x = 346,336,832.32
  5. Step 5: Solve for x
    x = 346,336,832.32/20,183.58
  6. Step 6: Final answer
    x = 17,159.34

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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.