Home / 2,815.42-3,885.30-1,556.44

Finding the Fourth Proportional to 2,815.42, 3,885.30 and 1,556.44

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Solution

The fourth proportional to 2,815.42, 3,885.30 and 1,556.44 is: 2,147.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.42 : 3,885.30 = 1,556.44 : x
  2. Step 2: Convert to fraction form
    2,815.42/3,885.30 = 1,556.44/x
  3. Step 3: Cross multiply
    2,815.42x = 3,885.30 × 1,556.44
  4. Step 4: Simplify right side
    2,815.42x = 6,047,236.33
  5. Step 5: Solve for x
    x = 6,047,236.33/2,815.42
  6. Step 6: Final answer
    x = 2,147.90

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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.