Home / 3,779.13-5,215.21-2,100.65

Finding the Fourth Proportional to 3,779.13, 5,215.21 and 2,100.65

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Solution

The fourth proportional to 3,779.13, 5,215.21 and 2,100.65 is: 2,898.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.13 : 5,215.21 = 2,100.65 : x
  2. Step 2: Convert to fraction form
    3,779.13/5,215.21 = 2,100.65/x
  3. Step 3: Cross multiply
    3,779.13x = 5,215.21 × 2,100.65
  4. Step 4: Simplify right side
    3,779.13x = 10,955,299.56
  5. Step 5: Solve for x
    x = 10,955,299.56/3,779.13
  6. Step 6: Final answer
    x = 2,898.89

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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.