Home / 3,779.20-5,215.16-2,100.68

Finding the Fourth Proportional to 3,779.20, 5,215.16 and 2,100.68

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Solution

The fourth proportional to 3,779.20, 5,215.16 and 2,100.68 is: 2,898.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.20 : 5,215.16 = 2,100.68 : x
  2. Step 2: Convert to fraction form
    3,779.20/5,215.16 = 2,100.68/x
  3. Step 3: Cross multiply
    3,779.20x = 5,215.16 × 2,100.68
  4. Step 4: Simplify right side
    3,779.20x = 10,955,382.31
  5. Step 5: Solve for x
    x = 10,955,382.31/3,779.20
  6. Step 6: Final answer
    x = 2,898.86

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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.