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Finding the Fourth Proportional to 11,231.10, 16,858.80 and 8,776.80

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Solution

The fourth proportional to 11,231.10, 16,858.80 and 8,776.80 is: 13,174.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,231.10 : 16,858.80 = 8,776.80 : x
  2. Step 2: Convert to fraction form
    11,231.10/16,858.80 = 8,776.80/x
  3. Step 3: Cross multiply
    11,231.10x = 16,858.80 × 8,776.80
  4. Step 4: Simplify right side
    11,231.10x = 147,966,315.84
  5. Step 5: Solve for x
    x = 147,966,315.84/11,231.10
  6. Step 6: Final answer
    x = 13,174.69

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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.