Home / 4,351.49-6,521.78-3,121.31

Finding the Fourth Proportional to 4,351.49, 6,521.78 and 3,121.31

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Solution

The fourth proportional to 4,351.49, 6,521.78 and 3,121.31 is: 4,678.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,351.49 : 6,521.78 = 3,121.31 : x
  2. Step 2: Convert to fraction form
    4,351.49/6,521.78 = 3,121.31/x
  3. Step 3: Cross multiply
    4,351.49x = 6,521.78 × 3,121.31
  4. Step 4: Simplify right side
    4,351.49x = 20,356,448.92
  5. Step 5: Solve for x
    x = 20,356,448.92/4,351.49
  6. Step 6: Final answer
    x = 4,678.04

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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.