Home / 3,869.50-5,339.91-2,101.12

Finding the Fourth Proportional to 3,869.50, 5,339.91 and 2,101.12

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Solution

The fourth proportional to 3,869.50, 5,339.91 and 2,101.12 is: 2,899.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.50 : 5,339.91 = 2,101.12 : x
  2. Step 2: Convert to fraction form
    3,869.50/5,339.91 = 2,101.12/x
  3. Step 3: Cross multiply
    3,869.50x = 5,339.91 × 2,101.12
  4. Step 4: Simplify right side
    3,869.50x = 11,219,791.70
  5. Step 5: Solve for x
    x = 11,219,791.70/3,869.50
  6. Step 6: Final answer
    x = 2,899.55

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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.