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Finding the Fourth Proportional to 28,738.98, 43,104.81 and 21,354.21

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Solution

The fourth proportional to 28,738.98, 43,104.81 and 21,354.21 is: 32,028.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,738.98 : 43,104.81 = 21,354.21 : x
  2. Step 2: Convert to fraction form
    28,738.98/43,104.81 = 21,354.21/x
  3. Step 3: Cross multiply
    28,738.98x = 43,104.81 × 21,354.21
  4. Step 4: Simplify right side
    28,738.98x = 920,469,164.75
  5. Step 5: Solve for x
    x = 920,469,164.75/28,738.98
  6. Step 6: Final answer
    x = 32,028.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.