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Finding the Fourth Proportional to 12,553.86, 18,830.94 and 3,789.16

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Solution

The fourth proportional to 12,553.86, 18,830.94 and 3,789.16 is: 5,683.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,553.86 : 18,830.94 = 3,789.16 : x
  2. Step 2: Convert to fraction form
    12,553.86/18,830.94 = 3,789.16/x
  3. Step 3: Cross multiply
    12,553.86x = 18,830.94 × 3,789.16
  4. Step 4: Simplify right side
    12,553.86x = 71,353,444.61
  5. Step 5: Solve for x
    x = 71,353,444.61/12,553.86
  6. Step 6: Final answer
    x = 5,683.79

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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.