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Finding the Fourth Proportional to 14,843.19, 20,483.50 and 8,128.69

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Solution

The fourth proportional to 14,843.19, 20,483.50 and 8,128.69 is: 11,217.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,843.19 : 20,483.50 = 8,128.69 : x
  2. Step 2: Convert to fraction form
    14,843.19/20,483.50 = 8,128.69/x
  3. Step 3: Cross multiply
    14,843.19x = 20,483.50 × 8,128.69
  4. Step 4: Simplify right side
    14,843.19x = 166,504,021.62
  5. Step 5: Solve for x
    x = 166,504,021.62/14,843.19
  6. Step 6: Final answer
    x = 11,217.54

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Double scale
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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.