Home / 2,815.20-3,884.96-1,556.24

Finding the Fourth Proportional to 2,815.20, 3,884.96 and 1,556.24

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Solution

The fourth proportional to 2,815.20, 3,884.96 and 1,556.24 is: 2,147.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.20 : 3,884.96 = 1,556.24 : x
  2. Step 2: Convert to fraction form
    2,815.20/3,884.96 = 1,556.24/x
  3. Step 3: Cross multiply
    2,815.20x = 3,884.96 × 1,556.24
  4. Step 4: Simplify right side
    2,815.20x = 6,045,930.15
  5. Step 5: Solve for x
    x = 6,045,930.15/2,815.20
  6. Step 6: Final answer
    x = 2,147.60

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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.