Home / 3,869.12-5,339.50-2,100.84

Finding the Fourth Proportional to 3,869.12, 5,339.50 and 2,100.84

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Solution

The fourth proportional to 3,869.12, 5,339.50 and 2,100.84 is: 2,899.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.12 : 5,339.50 = 2,100.84 : x
  2. Step 2: Convert to fraction form
    3,869.12/5,339.50 = 2,100.84/x
  3. Step 3: Cross multiply
    3,869.12x = 5,339.50 × 2,100.84
  4. Step 4: Simplify right side
    3,869.12x = 11,217,435.18
  5. Step 5: Solve for x
    x = 11,217,435.18/3,869.12
  6. Step 6: Final answer
    x = 2,899.22

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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.