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Finding the Fourth Proportional to 20,795.70, 28,698.06 and 11,843.21

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Solution

The fourth proportional to 20,795.70, 28,698.06 and 11,843.21 is: 16,343.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.70 : 28,698.06 = 11,843.21 : x
  2. Step 2: Convert to fraction form
    20,795.70/28,698.06 = 11,843.21/x
  3. Step 3: Cross multiply
    20,795.70x = 28,698.06 × 11,843.21
  4. Step 4: Simplify right side
    20,795.70x = 339,877,267.33
  5. Step 5: Solve for x
    x = 339,877,267.33/20,795.70
  6. Step 6: Final answer
    x = 16,343.63

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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.