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Finding the Fourth Proportional to 12,601.86, 18,890.09 and 7,925.21

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Solution

The fourth proportional to 12,601.86, 18,890.09 and 7,925.21 is: 11,879.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,601.86 : 18,890.09 = 7,925.21 : x
  2. Step 2: Convert to fraction form
    12,601.86/18,890.09 = 7,925.21/x
  3. Step 3: Cross multiply
    12,601.86x = 18,890.09 × 7,925.21
  4. Step 4: Simplify right side
    12,601.86x = 149,708,002.91
  5. Step 5: Solve for x
    x = 149,708,002.91/12,601.86
  6. Step 6: Final answer
    x = 11,879.83

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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.