Home / 13,211.96-18,234.36-8,177.79

Finding the Fourth Proportional to 13,211.96, 18,234.36 and 8,177.79

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Solution

The fourth proportional to 13,211.96, 18,234.36 and 8,177.79 is: 11,286.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.96 : 18,234.36 = 8,177.79 : x
  2. Step 2: Convert to fraction form
    13,211.96/18,234.36 = 8,177.79/x
  3. Step 3: Cross multiply
    13,211.96x = 18,234.36 × 8,177.79
  4. Step 4: Simplify right side
    13,211.96x = 149,116,766.86
  5. Step 5: Solve for x
    x = 149,116,766.86/13,211.96
  6. Step 6: Final answer
    x = 11,286.50

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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.