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Finding the Fourth Proportional to 11,186.80, 16,780.20 and 5,354.80

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Solution

The fourth proportional to 11,186.80, 16,780.20 and 5,354.80 is: 8,032.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,186.80 : 16,780.20 = 5,354.80 : x
  2. Step 2: Convert to fraction form
    11,186.80/16,780.20 = 5,354.80/x
  3. Step 3: Cross multiply
    11,186.80x = 16,780.20 × 5,354.80
  4. Step 4: Simplify right side
    11,186.80x = 89,854,614.96
  5. Step 5: Solve for x
    x = 89,854,614.96/11,186.80
  6. Step 6: Final answer
    x = 8,032.20

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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.