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Finding the Fourth Proportional to 28,119.36, 42,183.36 and 8,395.68

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Solution

The fourth proportional to 28,119.36, 42,183.36 and 8,395.68 is: 12,594.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.36 : 42,183.36 = 8,395.68 : x
  2. Step 2: Convert to fraction form
    28,119.36/42,183.36 = 8,395.68/x
  3. Step 3: Cross multiply
    28,119.36x = 42,183.36 × 8,395.68
  4. Step 4: Simplify right side
    28,119.36x = 354,157,991.88
  5. Step 5: Solve for x
    x = 354,157,991.88/28,119.36
  6. Step 6: Final answer
    x = 12,594.81

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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.