Home / 3,131.52-4,695.78-1,281.09

Finding the Fourth Proportional to 3,131.52, 4,695.78 and 1,281.09

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Solution

The fourth proportional to 3,131.52, 4,695.78 and 1,281.09 is: 1,921.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.52 : 4,695.78 = 1,281.09 : x
  2. Step 2: Convert to fraction form
    3,131.52/4,695.78 = 1,281.09/x
  3. Step 3: Cross multiply
    3,131.52x = 4,695.78 × 1,281.09
  4. Step 4: Simplify right side
    3,131.52x = 6,015,716.80
  5. Step 5: Solve for x
    x = 6,015,716.80/3,131.52
  6. Step 6: Final answer
    x = 1,921.02

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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.