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Finding the Fourth Proportional to 11,143.86, 16,723.97 and 8,978.73

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Solution

The fourth proportional to 11,143.86, 16,723.97 and 8,978.73 is: 13,474.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,143.86 : 16,723.97 = 8,978.73 : x
  2. Step 2: Convert to fraction form
    11,143.86/16,723.97 = 8,978.73/x
  3. Step 3: Cross multiply
    11,143.86x = 16,723.97 × 8,978.73
  4. Step 4: Simplify right side
    11,143.86x = 150,159,966.26
  5. Step 5: Solve for x
    x = 150,159,966.26/11,143.86
  6. Step 6: Final answer
    x = 13,474.68

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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.