Home / 2,856.94-3,944.19-2,157.10

Finding the Fourth Proportional to 2,856.94, 3,944.19 and 2,157.10

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Solution

The fourth proportional to 2,856.94, 3,944.19 and 2,157.10 is: 2,978.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.94 : 3,944.19 = 2,157.10 : x
  2. Step 2: Convert to fraction form
    2,856.94/3,944.19 = 2,157.10/x
  3. Step 3: Cross multiply
    2,856.94x = 3,944.19 × 2,157.10
  4. Step 4: Simplify right side
    2,856.94x = 8,508,010.48
  5. Step 5: Solve for x
    x = 8,508,010.48/2,856.94
  6. Step 6: Final answer
    x = 2,978.02

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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.