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Finding the Fourth Proportional to 7,179.32, 9,907.14 and 3,992.60

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Solution

The fourth proportional to 7,179.32, 9,907.14 and 3,992.60 is: 5,509.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,179.32 : 9,907.14 = 3,992.60 : x
  2. Step 2: Convert to fraction form
    7,179.32/9,907.14 = 3,992.60/x
  3. Step 3: Cross multiply
    7,179.32x = 9,907.14 × 3,992.60
  4. Step 4: Simplify right side
    7,179.32x = 39,555,197.63
  5. Step 5: Solve for x
    x = 39,555,197.63/7,179.32
  6. Step 6: Final answer
    x = 5,509.61

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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.