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Finding the Fourth Proportional to 6,639.08, 9,959.70 and 2,021

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Solution

The fourth proportional to 6,639.08, 9,959.70 and 2,021 is: 3,031.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.08 : 9,959.70 = 2,021 : x
  2. Step 2: Convert to fraction form
    6,639.08/9,959.70 = 2,021/x
  3. Step 3: Cross multiply
    6,639.08x = 9,959.70 × 2,021
  4. Step 4: Simplify right side
    6,639.08x = 20,128,553.70
  5. Step 5: Solve for x
    x = 20,128,553.70/6,639.08
  6. Step 6: Final answer
    x = 3,031.83

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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.