Home / 3,121.30-4,306.63-1,941.73

Finding the Fourth Proportional to 3,121.30, 4,306.63 and 1,941.73

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Solution

The fourth proportional to 3,121.30, 4,306.63 and 1,941.73 is: 2,679.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.30 : 4,306.63 = 1,941.73 : x
  2. Step 2: Convert to fraction form
    3,121.30/4,306.63 = 1,941.73/x
  3. Step 3: Cross multiply
    3,121.30x = 4,306.63 × 1,941.73
  4. Step 4: Simplify right side
    3,121.30x = 8,362,312.67
  5. Step 5: Solve for x
    x = 8,362,312.67/3,121.30
  6. Step 6: Final answer
    x = 2,679.11

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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.