Home / 3,886.88-5,363.91-2,118.60

Finding the Fourth Proportional to 3,886.88, 5,363.91 and 2,118.60

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Solution

The fourth proportional to 3,886.88, 5,363.91 and 2,118.60 is: 2,923.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.88 : 5,363.91 = 2,118.60 : x
  2. Step 2: Convert to fraction form
    3,886.88/5,363.91 = 2,118.60/x
  3. Step 3: Cross multiply
    3,886.88x = 5,363.91 × 2,118.60
  4. Step 4: Simplify right side
    3,886.88x = 11,363,979.73
  5. Step 5: Solve for x
    x = 11,363,979.73/3,886.88
  6. Step 6: Final answer
    x = 2,923.68

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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.