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Finding the Fourth Proportional to 18,550.64, 27,835.10 and 8,690.60

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Solution

The fourth proportional to 18,550.64, 27,835.10 and 8,690.60 is: 13,040.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,550.64 : 27,835.10 = 8,690.60 : x
  2. Step 2: Convert to fraction form
    18,550.64/27,835.10 = 8,690.60/x
  3. Step 3: Cross multiply
    18,550.64x = 27,835.10 × 8,690.60
  4. Step 4: Simplify right side
    18,550.64x = 241,903,720.06
  5. Step 5: Solve for x
    x = 241,903,720.06/18,550.64
  6. Step 6: Final answer
    x = 13,040.18

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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.