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Finding the Fourth Proportional to 12,379.77, 18,575.78 and 5,806.46

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Solution

The fourth proportional to 12,379.77, 18,575.78 and 5,806.46 is: 8,712.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.77 : 18,575.78 = 5,806.46 : x
  2. Step 2: Convert to fraction form
    12,379.77/18,575.78 = 5,806.46/x
  3. Step 3: Cross multiply
    12,379.77x = 18,575.78 × 5,806.46
  4. Step 4: Simplify right side
    12,379.77x = 107,859,523.54
  5. Step 5: Solve for x
    x = 107,859,523.54/12,379.77
  6. Step 6: Final answer
    x = 8,712.56

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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.