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Finding the Fourth Proportional to 18,396.46, 25,387.66 and 13,028.50

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Solution

The fourth proportional to 18,396.46, 25,387.66 and 13,028.50 is: 17,979.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,396.46 : 25,387.66 = 13,028.50 : x
  2. Step 2: Convert to fraction form
    18,396.46/25,387.66 = 13,028.50/x
  3. Step 3: Cross multiply
    18,396.46x = 25,387.66 × 13,028.50
  4. Step 4: Simplify right side
    18,396.46x = 330,763,128.31
  5. Step 5: Solve for x
    x = 330,763,128.31/18,396.46
  6. Step 6: Final answer
    x = 17,979.72

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.