Home / 11,961.72-17,920.26-8,666.76

Finding the Fourth Proportional to 11,961.72, 17,920.26 and 8,666.76

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Solution

The fourth proportional to 11,961.72, 17,920.26 and 8,666.76 is: 12,983.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,961.72 : 17,920.26 = 8,666.76 : x
  2. Step 2: Convert to fraction form
    11,961.72/17,920.26 = 8,666.76/x
  3. Step 3: Cross multiply
    11,961.72x = 17,920.26 × 8,666.76
  4. Step 4: Simplify right side
    11,961.72x = 155,310,592.56
  5. Step 5: Solve for x
    x = 155,310,592.56/11,961.72
  6. Step 6: Final answer
    x = 12,983.97

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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.