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Finding the Fourth Proportional to 11,220, 16,835.55 and 8,251.12

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Solution

The fourth proportional to 11,220, 16,835.55 and 8,251.12 is: 12,380.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220 : 16,835.55 = 8,251.12 : x
  2. Step 2: Convert to fraction form
    11,220/16,835.55 = 8,251.12/x
  3. Step 3: Cross multiply
    11,220x = 16,835.55 × 8,251.12
  4. Step 4: Simplify right side
    11,220x = 138,912,143.32
  5. Step 5: Solve for x
    x = 138,912,143.32/11,220
  6. Step 6: Final answer
    x = 12,380.76

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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.