Home / 7,282.72-10,919.40-3,121.60

Finding the Fourth Proportional to 7,282.72, 10,919.40 and 3,121.60

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Solution

The fourth proportional to 7,282.72, 10,919.40 and 3,121.60 is: 4,680.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,282.72 : 10,919.40 = 3,121.60 : x
  2. Step 2: Convert to fraction form
    7,282.72/10,919.40 = 3,121.60/x
  3. Step 3: Cross multiply
    7,282.72x = 10,919.40 × 3,121.60
  4. Step 4: Simplify right side
    7,282.72x = 34,085,999.04
  5. Step 5: Solve for x
    x = 34,085,999.04/7,282.72
  6. Step 6: Final answer
    x = 4,680.39

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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.