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Finding the Fourth Proportional to 6,638.79, 9,958.14 and 2,689.99

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Solution

The fourth proportional to 6,638.79, 9,958.14 and 2,689.99 is: 4,034.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.79 : 9,958.14 = 2,689.99 : x
  2. Step 2: Convert to fraction form
    6,638.79/9,958.14 = 2,689.99/x
  3. Step 3: Cross multiply
    6,638.79x = 9,958.14 × 2,689.99
  4. Step 4: Simplify right side
    6,638.79x = 26,787,328.14
  5. Step 5: Solve for x
    x = 26,787,328.14/6,638.79
  6. Step 6: Final answer
    x = 4,034.97

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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.