Home / 3,779.38-5,215.41-2,100.85

Finding the Fourth Proportional to 3,779.38, 5,215.41 and 2,100.85

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Solution

The fourth proportional to 3,779.38, 5,215.41 and 2,100.85 is: 2,899.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.38 : 5,215.41 = 2,100.85 : x
  2. Step 2: Convert to fraction form
    3,779.38/5,215.41 = 2,100.85/x
  3. Step 3: Cross multiply
    3,779.38x = 5,215.41 × 2,100.85
  4. Step 4: Simplify right side
    3,779.38x = 10,956,794.10
  5. Step 5: Solve for x
    x = 10,956,794.10/3,779.38
  6. Step 6: Final answer
    x = 2,899.10

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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.