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Finding the Fourth Proportional to 11,449.50, 15,800.31 and 6,481.50

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Solution

The fourth proportional to 11,449.50, 15,800.31 and 6,481.50 is: 8,944.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,449.50 : 15,800.31 = 6,481.50 : x
  2. Step 2: Convert to fraction form
    11,449.50/15,800.31 = 6,481.50/x
  3. Step 3: Cross multiply
    11,449.50x = 15,800.31 × 6,481.50
  4. Step 4: Simplify right side
    11,449.50x = 102,409,709.27
  5. Step 5: Solve for x
    x = 102,409,709.27/11,449.50
  6. Step 6: Final answer
    x = 8,944.47

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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.