Home / 3,856.19-5,320.94-2,177.21

Finding the Fourth Proportional to 3,856.19, 5,320.94 and 2,177.21

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Solution

The fourth proportional to 3,856.19, 5,320.94 and 2,177.21 is: 3,004.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.19 : 5,320.94 = 2,177.21 : x
  2. Step 2: Convert to fraction form
    3,856.19/5,320.94 = 2,177.21/x
  3. Step 3: Cross multiply
    3,856.19x = 5,320.94 × 2,177.21
  4. Step 4: Simplify right side
    3,856.19x = 11,584,806.19
  5. Step 5: Solve for x
    x = 11,584,806.19/3,856.19
  6. Step 6: Final answer
    x = 3,004.21

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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.