Home / 3,856.35-5,321.75-2,087.94

Finding the Fourth Proportional to 3,856.35, 5,321.75 and 2,087.94

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Solution

The fourth proportional to 3,856.35, 5,321.75 and 2,087.94 is: 2,881.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.35 : 5,321.75 = 2,087.94 : x
  2. Step 2: Convert to fraction form
    3,856.35/5,321.75 = 2,087.94/x
  3. Step 3: Cross multiply
    3,856.35x = 5,321.75 × 2,087.94
  4. Step 4: Simplify right side
    3,856.35x = 11,111,484.26
  5. Step 5: Solve for x
    x = 11,111,484.26/3,856.35
  6. Step 6: Final answer
    x = 2,881.35

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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.