Home / 7,821.78-11,732.68-2,631.30

Finding the Fourth Proportional to 7,821.78, 11,732.68 and 2,631.30

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Solution

The fourth proportional to 7,821.78, 11,732.68 and 2,631.30 is: 3,946.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.78 : 11,732.68 = 2,631.30 : x
  2. Step 2: Convert to fraction form
    7,821.78/11,732.68 = 2,631.30/x
  3. Step 3: Cross multiply
    7,821.78x = 11,732.68 × 2,631.30
  4. Step 4: Simplify right side
    7,821.78x = 30,872,200.88
  5. Step 5: Solve for x
    x = 30,872,200.88/7,821.78
  6. Step 6: Final answer
    x = 3,946.95

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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.