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Finding the Fourth Proportional to 18,656.37, 27,978.89 and 15,361.29

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Solution

The fourth proportional to 18,656.37, 27,978.89 and 15,361.29 is: 23,037.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.37 : 27,978.89 = 15,361.29 : x
  2. Step 2: Convert to fraction form
    18,656.37/27,978.89 = 15,361.29/x
  3. Step 3: Cross multiply
    18,656.37x = 27,978.89 × 15,361.29
  4. Step 4: Simplify right side
    18,656.37x = 429,791,766.36
  5. Step 5: Solve for x
    x = 429,791,766.36/18,656.37
  6. Step 6: Final answer
    x = 23,037.27

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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.