Home / 3,021.21-4,165.89-1,900.79

Finding the Fourth Proportional to 3,021.21, 4,165.89 and 1,900.79

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Solution

The fourth proportional to 3,021.21, 4,165.89 and 1,900.79 is: 2,620.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,021.21 : 4,165.89 = 1,900.79 : x
  2. Step 2: Convert to fraction form
    3,021.21/4,165.89 = 1,900.79/x
  3. Step 3: Cross multiply
    3,021.21x = 4,165.89 × 1,900.79
  4. Step 4: Simplify right side
    3,021.21x = 7,918,482.05
  5. Step 5: Solve for x
    x = 7,918,482.05/3,021.21
  6. Step 6: Final answer
    x = 2,620.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.