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Finding the Fourth Proportional to 7,179.61, 9,907.98 and 3,949.58

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Solution

The fourth proportional to 7,179.61, 9,907.98 and 3,949.58 is: 5,450.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,179.61 : 9,907.98 = 3,949.58 : x
  2. Step 2: Convert to fraction form
    7,179.61/9,907.98 = 3,949.58/x
  3. Step 3: Cross multiply
    7,179.61x = 9,907.98 × 3,949.58
  4. Step 4: Simplify right side
    7,179.61x = 39,132,310.11
  5. Step 5: Solve for x
    x = 39,132,310.11/7,179.61
  6. Step 6: Final answer
    x = 5,450.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.