Home / 3,131.82-4,690.97-2,947.80

Finding the Fourth Proportional to 3,131.82, 4,690.97 and 2,947.80

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Solution

The fourth proportional to 3,131.82, 4,690.97 and 2,947.80 is: 4,415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.82 : 4,690.97 = 2,947.80 : x
  2. Step 2: Convert to fraction form
    3,131.82/4,690.97 = 2,947.80/x
  3. Step 3: Cross multiply
    3,131.82x = 4,690.97 × 2,947.80
  4. Step 4: Simplify right side
    3,131.82x = 13,828,026.63
  5. Step 5: Solve for x
    x = 13,828,026.63/3,131.82
  6. Step 6: Final answer
    x = 4,415.33

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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.