Home / 30,120.60-45,183.78-12,588.60

Finding the Fourth Proportional to 30,120.60, 45,183.78 and 12,588.60

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Solution

The fourth proportional to 30,120.60, 45,183.78 and 12,588.60 is: 18,884.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,120.60 : 45,183.78 = 12,588.60 : x
  2. Step 2: Convert to fraction form
    30,120.60/45,183.78 = 12,588.60/x
  3. Step 3: Cross multiply
    30,120.60x = 45,183.78 × 12,588.60
  4. Step 4: Simplify right side
    30,120.60x = 568,800,532.91
  5. Step 5: Solve for x
    x = 568,800,532.91/30,120.60
  6. Step 6: Final answer
    x = 18,884.10

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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.