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Finding the Fourth Proportional to 7,779.65, 11,662.18 and 2,581.88

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Solution

The fourth proportional to 7,779.65, 11,662.18 and 2,581.88 is: 3,870.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.65 : 11,662.18 = 2,581.88 : x
  2. Step 2: Convert to fraction form
    7,779.65/11,662.18 = 2,581.88/x
  3. Step 3: Cross multiply
    7,779.65x = 11,662.18 × 2,581.88
  4. Step 4: Simplify right side
    7,779.65x = 30,110,284.53
  5. Step 5: Solve for x
    x = 30,110,284.53/7,779.65
  6. Step 6: Final answer
    x = 3,870.39

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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.