Home / 3,124.80-4,687.20-2,185.20

Finding the Fourth Proportional to 3,124.80, 4,687.20 and 2,185.20

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Solution

The fourth proportional to 3,124.80, 4,687.20 and 2,185.20 is: 3,277.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.80 : 4,687.20 = 2,185.20 : x
  2. Step 2: Convert to fraction form
    3,124.80/4,687.20 = 2,185.20/x
  3. Step 3: Cross multiply
    3,124.80x = 4,687.20 × 2,185.20
  4. Step 4: Simplify right side
    3,124.80x = 10,242,469.44
  5. Step 5: Solve for x
    x = 10,242,469.44/3,124.80
  6. Step 6: Final answer
    x = 3,277.80

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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.