Home / 3,856.10-5,321.43-2,087.70

Finding the Fourth Proportional to 3,856.10, 5,321.43 and 2,087.70

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Solution

The fourth proportional to 3,856.10, 5,321.43 and 2,087.70 is: 2,881.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.10 : 5,321.43 = 2,087.70 : x
  2. Step 2: Convert to fraction form
    3,856.10/5,321.43 = 2,087.70/x
  3. Step 3: Cross multiply
    3,856.10x = 5,321.43 × 2,087.70
  4. Step 4: Simplify right side
    3,856.10x = 11,109,521.63
  5. Step 5: Solve for x
    x = 11,109,521.63/3,856.10
  6. Step 6: Final answer
    x = 2,881.03

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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.