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Finding the Fourth Proportional to 25,879.00, 38,790.81 and 13,386.44

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Solution

The fourth proportional to 25,879.00, 38,790.81 and 13,386.44 is: 20,065.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,879.00 : 38,790.81 = 13,386.44 : x
  2. Step 2: Convert to fraction form
    25,879.00/38,790.81 = 13,386.44/x
  3. Step 3: Cross multiply
    25,879.00x = 38,790.81 × 13,386.44
  4. Step 4: Simplify right side
    25,879.00x = 519,270,850.62
  5. Step 5: Solve for x
    x = 519,270,850.62/25,879.00
  6. Step 6: Final answer
    x = 20,065.34

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Why These Related Problems?

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