Home / 3,856.19-5,321.50-2,087.75

Finding the Fourth Proportional to 3,856.19, 5,321.50 and 2,087.75

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Solution

The fourth proportional to 3,856.19, 5,321.50 and 2,087.75 is: 2,881.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.19 : 5,321.50 = 2,087.75 : x
  2. Step 2: Convert to fraction form
    3,856.19/5,321.50 = 2,087.75/x
  3. Step 3: Cross multiply
    3,856.19x = 5,321.50 × 2,087.75
  4. Step 4: Simplify right side
    3,856.19x = 11,109,969.71
  5. Step 5: Solve for x
    x = 11,109,969.71/3,856.19
  6. Step 6: Final answer
    x = 2,881.08

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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.