Home / 3,121.76-4,306.68-1,795.20

Finding the Fourth Proportional to 3,121.76, 4,306.68 and 1,795.20

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Solution

The fourth proportional to 3,121.76, 4,306.68 and 1,795.20 is: 2,476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.76 : 4,306.68 = 1,795.20 : x
  2. Step 2: Convert to fraction form
    3,121.76/4,306.68 = 1,795.20/x
  3. Step 3: Cross multiply
    3,121.76x = 4,306.68 × 1,795.20
  4. Step 4: Simplify right side
    3,121.76x = 7,731,351.94
  5. Step 5: Solve for x
    x = 7,731,351.94/3,121.76
  6. Step 6: Final answer
    x = 2,476.60

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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.