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Finding the Fourth Proportional to 13,246.88, 19,879.43 and 5,455.69

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Solution

The fourth proportional to 13,246.88, 19,879.43 and 5,455.69 is: 8,187.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,246.88 : 19,879.43 = 5,455.69 : x
  2. Step 2: Convert to fraction form
    13,246.88/19,879.43 = 5,455.69/x
  3. Step 3: Cross multiply
    13,246.88x = 19,879.43 × 5,455.69
  4. Step 4: Simplify right side
    13,246.88x = 108,455,930.48
  5. Step 5: Solve for x
    x = 108,455,930.48/13,246.88
  6. Step 6: Final answer
    x = 8,187.28

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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.