Home / 3,886.75-5,363.70-2,118.35

Finding the Fourth Proportional to 3,886.75, 5,363.70 and 2,118.35

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Solution

The fourth proportional to 3,886.75, 5,363.70 and 2,118.35 is: 2,923.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.75 : 5,363.70 = 2,118.35 : x
  2. Step 2: Convert to fraction form
    3,886.75/5,363.70 = 2,118.35/x
  3. Step 3: Cross multiply
    3,886.75x = 5,363.70 × 2,118.35
  4. Step 4: Simplify right side
    3,886.75x = 11,362,167.08
  5. Step 5: Solve for x
    x = 11,362,167.08/3,886.75
  6. Step 6: Final answer
    x = 2,923.31

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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.