Home / 7,788.42-11,687.31-2,790.41

Finding the Fourth Proportional to 7,788.42, 11,687.31 and 2,790.41

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Solution

The fourth proportional to 7,788.42, 11,687.31 and 2,790.41 is: 4,187.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,788.42 : 11,687.31 = 2,790.41 : x
  2. Step 2: Convert to fraction form
    7,788.42/11,687.31 = 2,790.41/x
  3. Step 3: Cross multiply
    7,788.42x = 11,687.31 × 2,790.41
  4. Step 4: Simplify right side
    7,788.42x = 32,612,328.26
  5. Step 5: Solve for x
    x = 32,612,328.26/7,788.42
  6. Step 6: Final answer
    x = 4,187.28

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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.