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Finding the Fourth Proportional to 11,156.65, 16,743.07 and 8,991.52

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Solution

The fourth proportional to 11,156.65, 16,743.07 and 8,991.52 is: 13,493.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,156.65 : 16,743.07 = 8,991.52 : x
  2. Step 2: Convert to fraction form
    11,156.65/16,743.07 = 8,991.52/x
  3. Step 3: Cross multiply
    11,156.65x = 16,743.07 × 8,991.52
  4. Step 4: Simplify right side
    11,156.65x = 150,545,648.77
  5. Step 5: Solve for x
    x = 150,545,648.77/11,156.65
  6. Step 6: Final answer
    x = 13,493.80

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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.