Home / 3,171.83-4,378.65-2,111.36

Finding the Fourth Proportional to 3,171.83, 4,378.65 and 2,111.36

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Solution

The fourth proportional to 3,171.83, 4,378.65 and 2,111.36 is: 2,914.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.83 : 4,378.65 = 2,111.36 : x
  2. Step 2: Convert to fraction form
    3,171.83/4,378.65 = 2,111.36/x
  3. Step 3: Cross multiply
    3,171.83x = 4,378.65 × 2,111.36
  4. Step 4: Simplify right side
    3,171.83x = 9,244,884.57
  5. Step 5: Solve for x
    x = 9,244,884.57/3,171.83
  6. Step 6: Final answer
    x = 2,914.69

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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.