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Finding the Fourth Proportional to 7,858.58, 11,798.81 and 3,965.72

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Solution

The fourth proportional to 7,858.58, 11,798.81 and 3,965.72 is: 5,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.58 : 11,798.81 = 3,965.72 : x
  2. Step 2: Convert to fraction form
    7,858.58/11,798.81 = 3,965.72/x
  3. Step 3: Cross multiply
    7,858.58x = 11,798.81 × 3,965.72
  4. Step 4: Simplify right side
    7,858.58x = 46,790,776.79
  5. Step 5: Solve for x
    x = 46,790,776.79/7,858.58
  6. Step 6: Final answer
    x = 5,954.10

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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.