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Finding the Fourth Proportional to 6,999.40, 9,658.94 and 3,855.58

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Solution

The fourth proportional to 6,999.40, 9,658.94 and 3,855.58 is: 5,320.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.40 : 9,658.94 = 3,855.58 : x
  2. Step 2: Convert to fraction form
    6,999.40/9,658.94 = 3,855.58/x
  3. Step 3: Cross multiply
    6,999.40x = 9,658.94 × 3,855.58
  4. Step 4: Simplify right side
    6,999.40x = 37,240,815.89
  5. Step 5: Solve for x
    x = 37,240,815.89/6,999.40
  6. Step 6: Final answer
    x = 5,320.57

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.