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Finding the Fourth Proportional to 11,811.20, 17,712.60 and 5,225.60

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Solution

The fourth proportional to 11,811.20, 17,712.60 and 5,225.60 is: 7,836.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.20 : 17,712.60 = 5,225.60 : x
  2. Step 2: Convert to fraction form
    11,811.20/17,712.60 = 5,225.60/x
  3. Step 3: Cross multiply
    11,811.20x = 17,712.60 × 5,225.60
  4. Step 4: Simplify right side
    11,811.20x = 92,558,962.56
  5. Step 5: Solve for x
    x = 92,558,962.56/11,811.20
  6. Step 6: Final answer
    x = 7,836.54

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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.