Home / 20,183.90-30,280.65-8,491.10

Finding the Fourth Proportional to 20,183.90, 30,280.65 and 8,491.10

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Solution

The fourth proportional to 20,183.90, 30,280.65 and 8,491.10 is: 12,738.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,183.90 : 30,280.65 = 8,491.10 : x
  2. Step 2: Convert to fraction form
    20,183.90/30,280.65 = 8,491.10/x
  3. Step 3: Cross multiply
    20,183.90x = 30,280.65 × 8,491.10
  4. Step 4: Simplify right side
    20,183.90x = 257,116,027.22
  5. Step 5: Solve for x
    x = 257,116,027.22/20,183.90
  6. Step 6: Final answer
    x = 12,738.67

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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.