Home / 3,819.79-5,271.29-2,141.20

Finding the Fourth Proportional to 3,819.79, 5,271.29 and 2,141.20

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Solution

The fourth proportional to 3,819.79, 5,271.29 and 2,141.20 is: 2,954.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,819.79 : 5,271.29 = 2,141.20 : x
  2. Step 2: Convert to fraction form
    3,819.79/5,271.29 = 2,141.20/x
  3. Step 3: Cross multiply
    3,819.79x = 5,271.29 × 2,141.20
  4. Step 4: Simplify right side
    3,819.79x = 11,286,865.14
  5. Step 5: Solve for x
    x = 11,286,865.14/3,819.79
  6. Step 6: Final answer
    x = 2,954.84

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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.