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Finding the Fourth Proportional to 12,173, 18,259.56 and 2,939

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Solution

The fourth proportional to 12,173, 18,259.56 and 2,939 is: 4,408.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,173 : 18,259.56 = 2,939 : x
  2. Step 2: Convert to fraction form
    12,173/18,259.56 = 2,939/x
  3. Step 3: Cross multiply
    12,173x = 18,259.56 × 2,939
  4. Step 4: Simplify right side
    12,173x = 53,664,846.84
  5. Step 5: Solve for x
    x = 53,664,846.84/12,173
  6. Step 6: Final answer
    x = 4,408.51

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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.