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Finding the Fourth Proportional to 13,455.60, 18,647.40 and 13,267.68

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Solution

The fourth proportional to 13,455.60, 18,647.40 and 13,267.68 is: 18,386.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.60 : 18,647.40 = 13,267.68 : x
  2. Step 2: Convert to fraction form
    13,455.60/18,647.40 = 13,267.68/x
  3. Step 3: Cross multiply
    13,455.60x = 18,647.40 × 13,267.68
  4. Step 4: Simplify right side
    13,455.60x = 247,407,736.03
  5. Step 5: Solve for x
    x = 247,407,736.03/13,455.60
  6. Step 6: Final answer
    x = 18,386.97

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These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.