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Finding the Fourth Proportional to 12,879.21, 19,318.83 and 7,032.63

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Solution

The fourth proportional to 12,879.21, 19,318.83 and 7,032.63 is: 10,548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.21 : 19,318.83 = 7,032.63 : x
  2. Step 2: Convert to fraction form
    12,879.21/19,318.83 = 7,032.63/x
  3. Step 3: Cross multiply
    12,879.21x = 19,318.83 × 7,032.63
  4. Step 4: Simplify right side
    12,879.21x = 135,862,183.42
  5. Step 5: Solve for x
    x = 135,862,183.42/12,879.21
  6. Step 6: Final answer
    x = 10,548.95

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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.