Home / 3,856.90-5,321.10-2,531.36

Finding the Fourth Proportional to 3,856.90, 5,321.10 and 2,531.36

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Solution

The fourth proportional to 3,856.90, 5,321.10 and 2,531.36 is: 3,492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.90 : 5,321.10 = 2,531.36 : x
  2. Step 2: Convert to fraction form
    3,856.90/5,321.10 = 2,531.36/x
  3. Step 3: Cross multiply
    3,856.90x = 5,321.10 × 2,531.36
  4. Step 4: Simplify right side
    3,856.90x = 13,469,619.70
  5. Step 5: Solve for x
    x = 13,469,619.70/3,856.90
  6. Step 6: Final answer
    x = 3,492.34

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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.