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Finding the Fourth Proportional to 17,919.48, 26,879.19 and 4,771.89

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Solution

The fourth proportional to 17,919.48, 26,879.19 and 4,771.89 is: 7,157.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,919.48 : 26,879.19 = 4,771.89 : x
  2. Step 2: Convert to fraction form
    17,919.48/26,879.19 = 4,771.89/x
  3. Step 3: Cross multiply
    17,919.48x = 26,879.19 × 4,771.89
  4. Step 4: Simplify right side
    17,919.48x = 128,264,537.97
  5. Step 5: Solve for x
    x = 128,264,537.97/17,919.48
  6. Step 6: Final answer
    x = 7,157.83

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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.