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Finding the Fourth Proportional to 11,919.78, 16,449.72 and 7,203.14

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Solution

The fourth proportional to 11,919.78, 16,449.72 and 7,203.14 is: 9,940.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,919.78 : 16,449.72 = 7,203.14 : x
  2. Step 2: Convert to fraction form
    11,919.78/16,449.72 = 7,203.14/x
  3. Step 3: Cross multiply
    11,919.78x = 16,449.72 × 7,203.14
  4. Step 4: Simplify right side
    11,919.78x = 118,489,636.12
  5. Step 5: Solve for x
    x = 118,489,636.12/11,919.78
  6. Step 6: Final answer
    x = 9,940.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.