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Finding the Fourth Proportional to 18,428.19, 25,431.95 and 13,944.16

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Solution

The fourth proportional to 18,428.19, 25,431.95 and 13,944.16 is: 19,243.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.19 : 25,431.95 = 13,944.16 : x
  2. Step 2: Convert to fraction form
    18,428.19/25,431.95 = 13,944.16/x
  3. Step 3: Cross multiply
    18,428.19x = 25,431.95 × 13,944.16
  4. Step 4: Simplify right side
    18,428.19x = 354,627,179.91
  5. Step 5: Solve for x
    x = 354,627,179.91/18,428.19
  6. Step 6: Final answer
    x = 19,243.73

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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.