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Finding the Fourth Proportional to 18,751.15, 28,112.80 and 11,353.85

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Solution

The fourth proportional to 18,751.15, 28,112.80 and 11,353.85 is: 17,022.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.15 : 28,112.80 = 11,353.85 : x
  2. Step 2: Convert to fraction form
    18,751.15/28,112.80 = 11,353.85/x
  3. Step 3: Cross multiply
    18,751.15x = 28,112.80 × 11,353.85
  4. Step 4: Simplify right side
    18,751.15x = 319,188,514.28
  5. Step 5: Solve for x
    x = 319,188,514.28/18,751.15
  6. Step 6: Final answer
    x = 17,022.34

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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.