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Finding the Fourth Proportional to 17,881.56, 26,835.91 and 12,245.78

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Solution

The fourth proportional to 17,881.56, 26,835.91 and 12,245.78 is: 18,377.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,881.56 : 26,835.91 = 12,245.78 : x
  2. Step 2: Convert to fraction form
    17,881.56/26,835.91 = 12,245.78/x
  3. Step 3: Cross multiply
    17,881.56x = 26,835.91 × 12,245.78
  4. Step 4: Simplify right side
    17,881.56x = 328,626,686.44
  5. Step 5: Solve for x
    x = 328,626,686.44/17,881.56
  6. Step 6: Final answer
    x = 18,377.97

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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.