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Finding the Fourth Proportional to 11,905.98, 17,860.94 and 4,009.20

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Solution

The fourth proportional to 11,905.98, 17,860.94 and 4,009.20 is: 6,014.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,905.98 : 17,860.94 = 4,009.20 : x
  2. Step 2: Convert to fraction form
    11,905.98/17,860.94 = 4,009.20/x
  3. Step 3: Cross multiply
    11,905.98x = 17,860.94 × 4,009.20
  4. Step 4: Simplify right side
    11,905.98x = 71,608,060.60
  5. Step 5: Solve for x
    x = 71,608,060.60/11,905.98
  6. Step 6: Final answer
    x = 6,014.46

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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.