Home / 3,855.31-5,320.21-2,176.69

Finding the Fourth Proportional to 3,855.31, 5,320.21 and 2,176.69

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Solution

The fourth proportional to 3,855.31, 5,320.21 and 2,176.69 is: 3,003.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.31 : 5,320.21 = 2,176.69 : x
  2. Step 2: Convert to fraction form
    3,855.31/5,320.21 = 2,176.69/x
  3. Step 3: Cross multiply
    3,855.31x = 5,320.21 × 2,176.69
  4. Step 4: Simplify right side
    3,855.31x = 11,580,447.90
  5. Step 5: Solve for x
    x = 11,580,447.90/3,855.31
  6. Step 6: Final answer
    x = 3,003.77

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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.