Home / 3,811.12-5,716.68-2,123.60

Finding the Fourth Proportional to 3,811.12, 5,716.68 and 2,123.60

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Solution

The fourth proportional to 3,811.12, 5,716.68 and 2,123.60 is: 3,185.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.12 : 5,716.68 = 2,123.60 : x
  2. Step 2: Convert to fraction form
    3,811.12/5,716.68 = 2,123.60/x
  3. Step 3: Cross multiply
    3,811.12x = 5,716.68 × 2,123.60
  4. Step 4: Simplify right side
    3,811.12x = 12,139,941.65
  5. Step 5: Solve for x
    x = 12,139,941.65/3,811.12
  6. Step 6: Final answer
    x = 3,185.40

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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.