Home / 3,113.19-4,290.44-2,118.51

Finding the Fourth Proportional to 3,113.19, 4,290.44 and 2,118.51

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Solution

The fourth proportional to 3,113.19, 4,290.44 and 2,118.51 is: 2,919.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.19 : 4,290.44 = 2,118.51 : x
  2. Step 2: Convert to fraction form
    3,113.19/4,290.44 = 2,118.51/x
  3. Step 3: Cross multiply
    3,113.19x = 4,290.44 × 2,118.51
  4. Step 4: Simplify right side
    3,113.19x = 9,089,329.45
  5. Step 5: Solve for x
    x = 9,089,329.45/3,113.19
  6. Step 6: Final answer
    x = 2,919.62

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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.