Home / 11,815.81-17,722.74-3,915.75

Finding the Fourth Proportional to 11,815.81, 17,722.74 and 3,915.75

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Solution

The fourth proportional to 11,815.81, 17,722.74 and 3,915.75 is: 5,873.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,815.81 : 17,722.74 = 3,915.75 : x
  2. Step 2: Convert to fraction form
    11,815.81/17,722.74 = 3,915.75/x
  3. Step 3: Cross multiply
    11,815.81x = 17,722.74 × 3,915.75
  4. Step 4: Simplify right side
    11,815.81x = 69,397,730.54
  5. Step 5: Solve for x
    x = 69,397,730.54/11,815.81
  6. Step 6: Final answer
    x = 5,873.29

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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.