Home / 4,128.20-6,192.30-2,378.60

Finding the Fourth Proportional to 4,128.20, 6,192.30 and 2,378.60

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Solution

The fourth proportional to 4,128.20, 6,192.30 and 2,378.60 is: 3,567.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,128.20 : 6,192.30 = 2,378.60 : x
  2. Step 2: Convert to fraction form
    4,128.20/6,192.30 = 2,378.60/x
  3. Step 3: Cross multiply
    4,128.20x = 6,192.30 × 2,378.60
  4. Step 4: Simplify right side
    4,128.20x = 14,729,004.78
  5. Step 5: Solve for x
    x = 14,729,004.78/4,128.20
  6. Step 6: Final answer
    x = 3,567.90

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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.