Home / 3,405.13-5,100.81-3,121.63

Finding the Fourth Proportional to 3,405.13, 5,100.81 and 3,121.63

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Solution

The fourth proportional to 3,405.13, 5,100.81 and 3,121.63 is: 4,676.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.13 : 5,100.81 = 3,121.63 : x
  2. Step 2: Convert to fraction form
    3,405.13/5,100.81 = 3,121.63/x
  3. Step 3: Cross multiply
    3,405.13x = 5,100.81 × 3,121.63
  4. Step 4: Simplify right side
    3,405.13x = 15,922,817.06
  5. Step 5: Solve for x
    x = 15,922,817.06/3,405.13
  6. Step 6: Final answer
    x = 4,676.13

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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.