Home / 2,815.72-3,885.70-1,556.84

Finding the Fourth Proportional to 2,815.72, 3,885.70 and 1,556.84

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Solution

The fourth proportional to 2,815.72, 3,885.70 and 1,556.84 is: 2,148.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.72 : 3,885.70 = 1,556.84 : x
  2. Step 2: Convert to fraction form
    2,815.72/3,885.70 = 1,556.84/x
  3. Step 3: Cross multiply
    2,815.72x = 3,885.70 × 1,556.84
  4. Step 4: Simplify right side
    2,815.72x = 6,049,413.19
  5. Step 5: Solve for x
    x = 6,049,413.19/2,815.72
  6. Step 6: Final answer
    x = 2,148.44

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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.