Home / 11,919.90-17,880.72-3,154.75

Finding the Fourth Proportional to 11,919.90, 17,880.72 and 3,154.75

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Solution

The fourth proportional to 11,919.90, 17,880.72 and 3,154.75 is: 4,732.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,919.90 : 17,880.72 = 3,154.75 : x
  2. Step 2: Convert to fraction form
    11,919.90/17,880.72 = 3,154.75/x
  3. Step 3: Cross multiply
    11,919.90x = 17,880.72 × 3,154.75
  4. Step 4: Simplify right side
    11,919.90x = 56,409,201.42
  5. Step 5: Solve for x
    x = 56,409,201.42/11,919.90
  6. Step 6: Final answer
    x = 4,732.36

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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.