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Finding the Fourth Proportional to 11,879.84, 16,400.97 and 8,871.50

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Solution

The fourth proportional to 11,879.84, 16,400.97 and 8,871.50 is: 12,247.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.84 : 16,400.97 = 8,871.50 : x
  2. Step 2: Convert to fraction form
    11,879.84/16,400.97 = 8,871.50/x
  3. Step 3: Cross multiply
    11,879.84x = 16,400.97 × 8,871.50
  4. Step 4: Simplify right side
    11,879.84x = 145,501,078.99
  5. Step 5: Solve for x
    x = 145,501,078.99/11,879.84
  6. Step 6: Final answer
    x = 12,247.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.