Home / 2,106.19-3,171.89-1,919.35

Finding the Fourth Proportional to 2,106.19, 3,171.89 and 1,919.35

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Solution

The fourth proportional to 2,106.19, 3,171.89 and 1,919.35 is: 2,890.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.19 : 3,171.89 = 1,919.35 : x
  2. Step 2: Convert to fraction form
    2,106.19/3,171.89 = 1,919.35/x
  3. Step 3: Cross multiply
    2,106.19x = 3,171.89 × 1,919.35
  4. Step 4: Simplify right side
    2,106.19x = 6,087,967.07
  5. Step 5: Solve for x
    x = 6,087,967.07/2,106.19
  6. Step 6: Final answer
    x = 2,890.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.