Home / 2,781.58-3,815.95-2,708.95

Finding the Fourth Proportional to 2,781.58, 3,815.95 and 2,708.95

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Solution

The fourth proportional to 2,781.58, 3,815.95 and 2,708.95 is: 3,716.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.58 : 3,815.95 = 2,708.95 : x
  2. Step 2: Convert to fraction form
    2,781.58/3,815.95 = 2,708.95/x
  3. Step 3: Cross multiply
    2,781.58x = 3,815.95 × 2,708.95
  4. Step 4: Simplify right side
    2,781.58x = 10,337,217.75
  5. Step 5: Solve for x
    x = 10,337,217.75/2,781.58
  6. Step 6: Final answer
    x = 3,716.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.