Home / 13,078.26-18,042.75-8,040.87

Finding the Fourth Proportional to 13,078.26, 18,042.75 and 8,040.87

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Solution

The fourth proportional to 13,078.26, 18,042.75 and 8,040.87 is: 11,093.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.26 : 18,042.75 = 8,040.87 : x
  2. Step 2: Convert to fraction form
    13,078.26/18,042.75 = 8,040.87/x
  3. Step 3: Cross multiply
    13,078.26x = 18,042.75 × 8,040.87
  4. Step 4: Simplify right side
    13,078.26x = 145,079,407.19
  5. Step 5: Solve for x
    x = 145,079,407.19/13,078.26
  6. Step 6: Final answer
    x = 11,093.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.