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Finding the Fourth Proportional to 28,192.80, 38,879.22 and 16,860.48

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Solution

The fourth proportional to 28,192.80, 38,879.22 and 16,860.48 is: 23,251.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,192.80 : 38,879.22 = 16,860.48 : x
  2. Step 2: Convert to fraction form
    28,192.80/38,879.22 = 16,860.48/x
  3. Step 3: Cross multiply
    28,192.80x = 38,879.22 × 16,860.48
  4. Step 4: Simplify right side
    28,192.80x = 655,522,311.23
  5. Step 5: Solve for x
    x = 655,522,311.23/28,192.80
  6. Step 6: Final answer
    x = 23,251.41

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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.