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Finding the Fourth Proportional to 28,209.58, 38,918.80 and 16,879.34

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Solution

The fourth proportional to 28,209.58, 38,918.80 and 16,879.34 is: 23,287.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.58 : 38,918.80 = 16,879.34 : x
  2. Step 2: Convert to fraction form
    28,209.58/38,918.80 = 16,879.34/x
  3. Step 3: Cross multiply
    28,209.58x = 38,918.80 × 16,879.34
  4. Step 4: Simplify right side
    28,209.58x = 656,923,657.59
  5. Step 5: Solve for x
    x = 656,923,657.59/28,209.58
  6. Step 6: Final answer
    x = 23,287.25

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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.