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Finding the Fourth Proportional to 6,489.12, 9,733.08 and 2,790.68

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Solution

The fourth proportional to 6,489.12, 9,733.08 and 2,790.68 is: 4,185.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.12 : 9,733.08 = 2,790.68 : x
  2. Step 2: Convert to fraction form
    6,489.12/9,733.08 = 2,790.68/x
  3. Step 3: Cross multiply
    6,489.12x = 9,733.08 × 2,790.68
  4. Step 4: Simplify right side
    6,489.12x = 27,161,911.69
  5. Step 5: Solve for x
    x = 27,161,911.69/6,489.12
  6. Step 6: Final answer
    x = 4,185.76

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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.