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Finding the Fourth Proportional to 11,990.58, 17,987.52 and 4,090.98

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Solution

The fourth proportional to 11,990.58, 17,987.52 and 4,090.98 is: 6,137.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,990.58 : 17,987.52 = 4,090.98 : x
  2. Step 2: Convert to fraction form
    11,990.58/17,987.52 = 4,090.98/x
  3. Step 3: Cross multiply
    11,990.58x = 17,987.52 × 4,090.98
  4. Step 4: Simplify right side
    11,990.58x = 73,586,529.37
  5. Step 5: Solve for x
    x = 73,586,529.37/11,990.58
  6. Step 6: Final answer
    x = 6,137.03

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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.