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Finding the Fourth Proportional to 12,775.92, 19,163.88 and 3,891.32

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Solution

The fourth proportional to 12,775.92, 19,163.88 and 3,891.32 is: 5,836.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,775.92 : 19,163.88 = 3,891.32 : x
  2. Step 2: Convert to fraction form
    12,775.92/19,163.88 = 3,891.32/x
  3. Step 3: Cross multiply
    12,775.92x = 19,163.88 × 3,891.32
  4. Step 4: Simplify right side
    12,775.92x = 74,572,789.52
  5. Step 5: Solve for x
    x = 74,572,789.52/12,775.92
  6. Step 6: Final answer
    x = 5,836.98

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Similar ratio
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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.