Home / 13,091.07-19,623.91-5,191

Finding the Fourth Proportional to 13,091.07, 19,623.91 and 5,191

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Solution

The fourth proportional to 13,091.07, 19,623.91 and 5,191 is: 7,781.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,091.07 : 19,623.91 = 5,191 : x
  2. Step 2: Convert to fraction form
    13,091.07/19,623.91 = 5,191/x
  3. Step 3: Cross multiply
    13,091.07x = 19,623.91 × 5,191
  4. Step 4: Simplify right side
    13,091.07x = 101,867,716.81
  5. Step 5: Solve for x
    x = 101,867,716.81/13,091.07
  6. Step 6: Final answer
    x = 7,781.47

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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.