Home / 2,815.66-3,885.73-1,556.72

Finding the Fourth Proportional to 2,815.66, 3,885.73 and 1,556.72

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Solution

The fourth proportional to 2,815.66, 3,885.73 and 1,556.72 is: 2,148.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.66 : 3,885.73 = 1,556.72 : x
  2. Step 2: Convert to fraction form
    2,815.66/3,885.73 = 1,556.72/x
  3. Step 3: Cross multiply
    2,815.66x = 3,885.73 × 1,556.72
  4. Step 4: Simplify right side
    2,815.66x = 6,048,993.61
  5. Step 5: Solve for x
    x = 6,048,993.61/2,815.66
  6. Step 6: Final answer
    x = 2,148.34

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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.