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Finding the Fourth Proportional to 14,481.75, 19,984.82 and 7,857.75

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Solution

The fourth proportional to 14,481.75, 19,984.82 and 7,857.75 is: 10,843.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,481.75 : 19,984.82 = 7,857.75 : x
  2. Step 2: Convert to fraction form
    14,481.75/19,984.82 = 7,857.75/x
  3. Step 3: Cross multiply
    14,481.75x = 19,984.82 × 7,857.75
  4. Step 4: Simplify right side
    14,481.75x = 157,035,680.07
  5. Step 5: Solve for x
    x = 157,035,680.07/14,481.75
  6. Step 6: Final answer
    x = 10,843.70

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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.