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Finding the Fourth Proportional to 12,393.41, 18,590.31 and 3,629.21

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Solution

The fourth proportional to 12,393.41, 18,590.31 and 3,629.21 is: 5,443.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.41 : 18,590.31 = 3,629.21 : x
  2. Step 2: Convert to fraction form
    12,393.41/18,590.31 = 3,629.21/x
  3. Step 3: Cross multiply
    12,393.41x = 18,590.31 × 3,629.21
  4. Step 4: Simplify right side
    12,393.41x = 67,468,046.00
  5. Step 5: Solve for x
    x = 67,468,046.00/12,393.41
  6. Step 6: Final answer
    x = 5,443.87

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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.