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Finding the Fourth Proportional to 18,603.36, 27,918.72 and 13,686.48

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Solution

The fourth proportional to 18,603.36, 27,918.72 and 13,686.48 is: 20,539.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.36 : 27,918.72 = 13,686.48 : x
  2. Step 2: Convert to fraction form
    18,603.36/27,918.72 = 13,686.48/x
  3. Step 3: Cross multiply
    18,603.36x = 27,918.72 × 13,686.48
  4. Step 4: Simplify right side
    18,603.36x = 382,109,002.91
  5. Step 5: Solve for x
    x = 382,109,002.91/18,603.36
  6. Step 6: Final answer
    x = 20,539.78

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.