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Finding the Fourth Proportional to 12,391.14, 18,595.44 and 5,817.54

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Solution

The fourth proportional to 12,391.14, 18,595.44 and 5,817.54 is: 8,730.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.14 : 18,595.44 = 5,817.54 : x
  2. Step 2: Convert to fraction form
    12,391.14/18,595.44 = 5,817.54/x
  3. Step 3: Cross multiply
    12,391.14x = 18,595.44 × 5,817.54
  4. Step 4: Simplify right side
    12,391.14x = 108,179,716.02
  5. Step 5: Solve for x
    x = 108,179,716.02/12,391.14
  6. Step 6: Final answer
    x = 8,730.41

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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.