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Finding the Fourth Proportional to 6,639.63, 9,956.63 and 2,939.25

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Solution

The fourth proportional to 6,639.63, 9,956.63 and 2,939.25 is: 4,407.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.63 : 9,956.63 = 2,939.25 : x
  2. Step 2: Convert to fraction form
    6,639.63/9,956.63 = 2,939.25/x
  3. Step 3: Cross multiply
    6,639.63x = 9,956.63 × 2,939.25
  4. Step 4: Simplify right side
    6,639.63x = 29,265,010.03
  5. Step 5: Solve for x
    x = 29,265,010.03/6,639.63
  6. Step 6: Final answer
    x = 4,407.63

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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.