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Finding the Fourth Proportional to 12,169.97, 18,255.07 and 4,775.18

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Solution

The fourth proportional to 12,169.97, 18,255.07 and 4,775.18 is: 7,162.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,169.97 : 18,255.07 = 4,775.18 : x
  2. Step 2: Convert to fraction form
    12,169.97/18,255.07 = 4,775.18/x
  3. Step 3: Cross multiply
    12,169.97x = 18,255.07 × 4,775.18
  4. Step 4: Simplify right side
    12,169.97x = 87,171,211.20
  5. Step 5: Solve for x
    x = 87,171,211.20/12,169.97
  6. Step 6: Final answer
    x = 7,162.81

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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.