Home / 2,815.12-3,884.68-1,636

Finding the Fourth Proportional to 2,815.12, 3,884.68 and 1,636

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Solution

The fourth proportional to 2,815.12, 3,884.68 and 1,636 is: 2,257.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.12 : 3,884.68 = 1,636 : x
  2. Step 2: Convert to fraction form
    2,815.12/3,884.68 = 1,636/x
  3. Step 3: Cross multiply
    2,815.12x = 3,884.68 × 1,636
  4. Step 4: Simplify right side
    2,815.12x = 6,355,336.48
  5. Step 5: Solve for x
    x = 6,355,336.48/2,815.12
  6. Step 6: Final answer
    x = 2,257.57

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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.