Home / 2,782.12-3,838.94-1,788.74

Finding the Fourth Proportional to 2,782.12, 3,838.94 and 1,788.74

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Solution

The fourth proportional to 2,782.12, 3,838.94 and 1,788.74 is: 2,468.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.12 : 3,838.94 = 1,788.74 : x
  2. Step 2: Convert to fraction form
    2,782.12/3,838.94 = 1,788.74/x
  3. Step 3: Cross multiply
    2,782.12x = 3,838.94 × 1,788.74
  4. Step 4: Simplify right side
    2,782.12x = 6,866,850.81
  5. Step 5: Solve for x
    x = 6,866,850.81/2,782.12
  6. Step 6: Final answer
    x = 2,468.21

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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.