Home / 3,779.72-5,215.90-2,101.05

Finding the Fourth Proportional to 3,779.72, 5,215.90 and 2,101.05

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Solution

The fourth proportional to 3,779.72, 5,215.90 and 2,101.05 is: 2,899.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.72 : 5,215.90 = 2,101.05 : x
  2. Step 2: Convert to fraction form
    3,779.72/5,215.90 = 2,101.05/x
  3. Step 3: Cross multiply
    3,779.72x = 5,215.90 × 2,101.05
  4. Step 4: Simplify right side
    3,779.72x = 10,958,866.70
  5. Step 5: Solve for x
    x = 10,958,866.70/3,779.72
  6. Step 6: Final answer
    x = 2,899.39

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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.