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Finding the Fourth Proportional to 18,763, 25,893.42 and 11,311.48

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Solution

The fourth proportional to 18,763, 25,893.42 and 11,311.48 is: 15,610.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763 : 25,893.42 = 11,311.48 : x
  2. Step 2: Convert to fraction form
    18,763/25,893.42 = 11,311.48/x
  3. Step 3: Cross multiply
    18,763x = 25,893.42 × 11,311.48
  4. Step 4: Simplify right side
    18,763x = 292,892,902.46
  5. Step 5: Solve for x
    x = 292,892,902.46/18,763
  6. Step 6: Final answer
    x = 15,610.13

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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.