Home / 2,886.75-3,981.78-2,141.37

Finding the Fourth Proportional to 2,886.75, 3,981.78 and 2,141.37

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Solution

The fourth proportional to 2,886.75, 3,981.78 and 2,141.37 is: 2,953.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.75 : 3,981.78 = 2,141.37 : x
  2. Step 2: Convert to fraction form
    2,886.75/3,981.78 = 2,141.37/x
  3. Step 3: Cross multiply
    2,886.75x = 3,981.78 × 2,141.37
  4. Step 4: Simplify right side
    2,886.75x = 8,526,464.24
  5. Step 5: Solve for x
    x = 8,526,464.24/2,886.75
  6. Step 6: Final answer
    x = 2,953.66

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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.