Home / 4,071.81-6,109.07-1,991.39

Finding the Fourth Proportional to 4,071.81, 6,109.07 and 1,991.39

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Solution

The fourth proportional to 4,071.81, 6,109.07 and 1,991.39 is: 2,987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,071.81 : 6,109.07 = 1,991.39 : x
  2. Step 2: Convert to fraction form
    4,071.81/6,109.07 = 1,991.39/x
  3. Step 3: Cross multiply
    4,071.81x = 6,109.07 × 1,991.39
  4. Step 4: Simplify right side
    4,071.81x = 12,165,546.22
  5. Step 5: Solve for x
    x = 12,165,546.22/4,071.81
  6. Step 6: Final answer
    x = 2,987.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.