Home / 2,815.68-3,885.54-1,556.71

Finding the Fourth Proportional to 2,815.68, 3,885.54 and 1,556.71

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Solution

The fourth proportional to 2,815.68, 3,885.54 and 1,556.71 is: 2,148.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.68 : 3,885.54 = 1,556.71 : x
  2. Step 2: Convert to fraction form
    2,815.68/3,885.54 = 1,556.71/x
  3. Step 3: Cross multiply
    2,815.68x = 3,885.54 × 1,556.71
  4. Step 4: Simplify right side
    2,815.68x = 6,048,658.97
  5. Step 5: Solve for x
    x = 6,048,658.97/2,815.68
  6. Step 6: Final answer
    x = 2,148.21

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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.