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Finding the Fourth Proportional to 28,855.25, 39,820.25 and 16,279.73

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Solution

The fourth proportional to 28,855.25, 39,820.25 and 16,279.73 is: 22,466.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,855.25 : 39,820.25 = 16,279.73 : x
  2. Step 2: Convert to fraction form
    28,855.25/39,820.25 = 16,279.73/x
  3. Step 3: Cross multiply
    28,855.25x = 39,820.25 × 16,279.73
  4. Step 4: Simplify right side
    28,855.25x = 648,262,837.13
  5. Step 5: Solve for x
    x = 648,262,837.13/28,855.25
  6. Step 6: Final answer
    x = 22,466.03

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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.