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Finding the Fourth Proportional to 7,858.76, 11,779.90 and 3,182.09

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Solution

The fourth proportional to 7,858.76, 11,779.90 and 3,182.09 is: 4,769.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.76 : 11,779.90 = 3,182.09 : x
  2. Step 2: Convert to fraction form
    7,858.76/11,779.90 = 3,182.09/x
  3. Step 3: Cross multiply
    7,858.76x = 11,779.90 × 3,182.09
  4. Step 4: Simplify right side
    7,858.76x = 37,484,635.14
  5. Step 5: Solve for x
    x = 37,484,635.14/7,858.76
  6. Step 6: Final answer
    x = 4,769.79

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1.5x scale

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.