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Finding the Fourth Proportional to 11,751.88, 17,628.86 and 3,318.46

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Solution

The fourth proportional to 11,751.88, 17,628.86 and 3,318.46 is: 4,977.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,751.88 : 17,628.86 = 3,318.46 : x
  2. Step 2: Convert to fraction form
    11,751.88/17,628.86 = 3,318.46/x
  3. Step 3: Cross multiply
    11,751.88x = 17,628.86 × 3,318.46
  4. Step 4: Simplify right side
    11,751.88x = 58,500,666.76
  5. Step 5: Solve for x
    x = 58,500,666.76/11,751.88
  6. Step 6: Final answer
    x = 4,977.98

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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.