Home / 8,378.10-12,556.20-4,222.80

Finding the Fourth Proportional to 8,378.10, 12,556.20 and 4,222.80

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Solution

The fourth proportional to 8,378.10, 12,556.20 and 4,222.80 is: 6,328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.10 : 12,556.20 = 4,222.80 : x
  2. Step 2: Convert to fraction form
    8,378.10/12,556.20 = 4,222.80/x
  3. Step 3: Cross multiply
    8,378.10x = 12,556.20 × 4,222.80
  4. Step 4: Simplify right side
    8,378.10x = 53,022,321.36
  5. Step 5: Solve for x
    x = 53,022,321.36/8,378.10
  6. Step 6: Final answer
    x = 6,328.68

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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.