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Finding the Fourth Proportional to 12,121.40, 18,183 and 8,840.90

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Solution

The fourth proportional to 12,121.40, 18,183 and 8,840.90 is: 13,262.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.40 : 18,183 = 8,840.90 : x
  2. Step 2: Convert to fraction form
    12,121.40/18,183 = 8,840.90/x
  3. Step 3: Cross multiply
    12,121.40x = 18,183 × 8,840.90
  4. Step 4: Simplify right side
    12,121.40x = 160,754,084.70
  5. Step 5: Solve for x
    x = 160,754,084.70/12,121.40
  6. Step 6: Final answer
    x = 13,262.01

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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.