Home / 13,179.75-18,187.89-7,211.33

Finding the Fourth Proportional to 13,179.75, 18,187.89 and 7,211.33

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Solution

The fourth proportional to 13,179.75, 18,187.89 and 7,211.33 is: 9,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.75 : 18,187.89 = 7,211.33 : x
  2. Step 2: Convert to fraction form
    13,179.75/18,187.89 = 7,211.33/x
  3. Step 3: Cross multiply
    13,179.75x = 18,187.89 × 7,211.33
  4. Step 4: Simplify right side
    13,179.75x = 131,158,876.79
  5. Step 5: Solve for x
    x = 131,158,876.79/13,179.75
  6. Step 6: Final answer
    x = 9,951.55

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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.