Home / 3,869.30-5,339.66-2,100.91

Finding the Fourth Proportional to 3,869.30, 5,339.66 and 2,100.91

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Solution

The fourth proportional to 3,869.30, 5,339.66 and 2,100.91 is: 2,899.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.30 : 5,339.66 = 2,100.91 : x
  2. Step 2: Convert to fraction form
    3,869.30/5,339.66 = 2,100.91/x
  3. Step 3: Cross multiply
    3,869.30x = 5,339.66 × 2,100.91
  4. Step 4: Simplify right side
    3,869.30x = 11,218,136.99
  5. Step 5: Solve for x
    x = 11,218,136.99/3,869.30
  6. Step 6: Final answer
    x = 2,899.27

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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.