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Finding the Fourth Proportional to 11,027.80, 16,501.20 and 8,111.80

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Solution

The fourth proportional to 11,027.80, 16,501.20 and 8,111.80 is: 12,137.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,027.80 : 16,501.20 = 8,111.80 : x
  2. Step 2: Convert to fraction form
    11,027.80/16,501.20 = 8,111.80/x
  3. Step 3: Cross multiply
    11,027.80x = 16,501.20 × 8,111.80
  4. Step 4: Simplify right side
    11,027.80x = 133,854,434.16
  5. Step 5: Solve for x
    x = 133,854,434.16/11,027.80
  6. Step 6: Final answer
    x = 12,137.91

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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.