Home / 3,420.51-5,121.90-2,930.07

Finding the Fourth Proportional to 3,420.51, 5,121.90 and 2,930.07

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Solution

The fourth proportional to 3,420.51, 5,121.90 and 2,930.07 is: 4,387.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.51 : 5,121.90 = 2,930.07 : x
  2. Step 2: Convert to fraction form
    3,420.51/5,121.90 = 2,930.07/x
  3. Step 3: Cross multiply
    3,420.51x = 5,121.90 × 2,930.07
  4. Step 4: Simplify right side
    3,420.51x = 15,007,544.74
  5. Step 5: Solve for x
    x = 15,007,544.74/3,420.51
  6. Step 6: Final answer
    x = 4,387.51

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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.