Home / 7,899.36-11,855.86-3,221.95

Finding the Fourth Proportional to 7,899.36, 11,855.86 and 3,221.95

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Solution

The fourth proportional to 7,899.36, 11,855.86 and 3,221.95 is: 4,835.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,899.36 : 11,855.86 = 3,221.95 : x
  2. Step 2: Convert to fraction form
    7,899.36/11,855.86 = 3,221.95/x
  3. Step 3: Cross multiply
    7,899.36x = 11,855.86 × 3,221.95
  4. Step 4: Simplify right side
    7,899.36x = 38,198,966.54
  5. Step 5: Solve for x
    x = 38,198,966.54/7,899.36
  6. Step 6: Final answer
    x = 4,835.70

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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.