Home / 2,855.40-4,284.30-2,131.24

Finding the Fourth Proportional to 2,855.40, 4,284.30 and 2,131.24

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Solution

The fourth proportional to 2,855.40, 4,284.30 and 2,131.24 is: 3,197.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.40 : 4,284.30 = 2,131.24 : x
  2. Step 2: Convert to fraction form
    2,855.40/4,284.30 = 2,131.24/x
  3. Step 3: Cross multiply
    2,855.40x = 4,284.30 × 2,131.24
  4. Step 4: Simplify right side
    2,855.40x = 9,130,871.53
  5. Step 5: Solve for x
    x = 9,130,871.53/2,855.40
  6. Step 6: Final answer
    x = 3,197.76

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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.