Home / 3,121.71-4,682.34-1,888.79

Finding the Fourth Proportional to 3,121.71, 4,682.34 and 1,888.79

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Solution

The fourth proportional to 3,121.71, 4,682.34 and 1,888.79 is: 2,833.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.71 : 4,682.34 = 1,888.79 : x
  2. Step 2: Convert to fraction form
    3,121.71/4,682.34 = 1,888.79/x
  3. Step 3: Cross multiply
    3,121.71x = 4,682.34 × 1,888.79
  4. Step 4: Simplify right side
    3,121.71x = 8,843,981.03
  5. Step 5: Solve for x
    x = 8,843,981.03/3,121.71
  6. Step 6: Final answer
    x = 2,833.05

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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.