Home / 3,885.51-5,355.95-2,889.21

Finding the Fourth Proportional to 3,885.51, 5,355.95 and 2,889.21

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Solution

The fourth proportional to 3,885.51, 5,355.95 and 2,889.21 is: 3,982.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.51 : 5,355.95 = 2,889.21 : x
  2. Step 2: Convert to fraction form
    3,885.51/5,355.95 = 2,889.21/x
  3. Step 3: Cross multiply
    3,885.51x = 5,355.95 × 2,889.21
  4. Step 4: Simplify right side
    3,885.51x = 15,474,449.85
  5. Step 5: Solve for x
    x = 15,474,449.85/3,885.51
  6. Step 6: Final answer
    x = 3,982.60

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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.