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Finding the Fourth Proportional to 18,989.25, 26,183.84 and 12,266.01

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Solution

The fourth proportional to 18,989.25, 26,183.84 and 12,266.01 is: 16,913.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.25 : 26,183.84 = 12,266.01 : x
  2. Step 2: Convert to fraction form
    18,989.25/26,183.84 = 12,266.01/x
  3. Step 3: Cross multiply
    18,989.25x = 26,183.84 × 12,266.01
  4. Step 4: Simplify right side
    18,989.25x = 321,171,181.95
  5. Step 5: Solve for x
    x = 321,171,181.95/18,989.25
  6. Step 6: Final answer
    x = 16,913.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.