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Finding the Fourth Proportional to 17,906.78, 26,860.15 and 4,759.16

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Solution

The fourth proportional to 17,906.78, 26,860.15 and 4,759.16 is: 7,138.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,906.78 : 26,860.15 = 4,759.16 : x
  2. Step 2: Convert to fraction form
    17,906.78/26,860.15 = 4,759.16/x
  3. Step 3: Cross multiply
    17,906.78x = 26,860.15 × 4,759.16
  4. Step 4: Simplify right side
    17,906.78x = 127,831,605.28
  5. Step 5: Solve for x
    x = 127,831,605.28/17,906.78
  6. Step 6: Final answer
    x = 7,138.73

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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.