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Finding the Fourth Proportional to 12,005, 18,009.56 and 5,343.92

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Solution

The fourth proportional to 12,005, 18,009.56 and 5,343.92 is: 8,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005 : 18,009.56 = 5,343.92 : x
  2. Step 2: Convert to fraction form
    12,005/18,009.56 = 5,343.92/x
  3. Step 3: Cross multiply
    12,005x = 18,009.56 × 5,343.92
  4. Step 4: Simplify right side
    12,005x = 96,241,647.88
  5. Step 5: Solve for x
    x = 96,241,647.88/12,005
  6. Step 6: Final answer
    x = 8,016.80

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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.