Home / 2,815.88-3,883.73-2,188.31

Finding the Fourth Proportional to 2,815.88, 3,883.73 and 2,188.31

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Solution

The fourth proportional to 2,815.88, 3,883.73 and 2,188.31 is: 3,018.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.88 : 3,883.73 = 2,188.31 : x
  2. Step 2: Convert to fraction form
    2,815.88/3,883.73 = 2,188.31/x
  3. Step 3: Cross multiply
    2,815.88x = 3,883.73 × 2,188.31
  4. Step 4: Simplify right side
    2,815.88x = 8,498,774.84
  5. Step 5: Solve for x
    x = 8,498,774.84/2,815.88
  6. Step 6: Final answer
    x = 3,018.16

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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.