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Finding the Fourth Proportional to 20,795.94, 28,698.21 and 11,724.21

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Solution

The fourth proportional to 20,795.94, 28,698.21 and 11,724.21 is: 16,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.94 : 28,698.21 = 11,724.21 : x
  2. Step 2: Convert to fraction form
    20,795.94/28,698.21 = 11,724.21/x
  3. Step 3: Cross multiply
    20,795.94x = 28,698.21 × 11,724.21
  4. Step 4: Simplify right side
    20,795.94x = 336,463,840.66
  5. Step 5: Solve for x
    x = 336,463,840.66/20,795.94
  6. Step 6: Final answer
    x = 16,179.30

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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.