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Finding the Fourth Proportional to 11,999.68, 18,008.76 and 7,838.56

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Solution

The fourth proportional to 11,999.68, 18,008.76 and 7,838.56 is: 11,763.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.68 : 18,008.76 = 7,838.56 : x
  2. Step 2: Convert to fraction form
    11,999.68/18,008.76 = 7,838.56/x
  3. Step 3: Cross multiply
    11,999.68x = 18,008.76 × 7,838.56
  4. Step 4: Simplify right side
    11,999.68x = 141,162,745.79
  5. Step 5: Solve for x
    x = 141,162,745.79/11,999.68
  6. Step 6: Final answer
    x = 11,763.88

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1.5x scale

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.