Home / 13,929.82-19,222.96-7,961.36

Finding the Fourth Proportional to 13,929.82, 19,222.96 and 7,961.36

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Solution

The fourth proportional to 13,929.82, 19,222.96 and 7,961.36 is: 10,986.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.82 : 19,222.96 = 7,961.36 : x
  2. Step 2: Convert to fraction form
    13,929.82/19,222.96 = 7,961.36/x
  3. Step 3: Cross multiply
    13,929.82x = 19,222.96 × 7,961.36
  4. Step 4: Simplify right side
    13,929.82x = 153,040,904.83
  5. Step 5: Solve for x
    x = 153,040,904.83/13,929.82
  6. Step 6: Final answer
    x = 10,986.57

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1.5x scale

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.