Home / 18,131.60-27,198.07-4,985

Finding the Fourth Proportional to 18,131.60, 27,198.07 and 4,985

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Solution

The fourth proportional to 18,131.60, 27,198.07 and 4,985 is: 7,477.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,131.60 : 27,198.07 = 4,985 : x
  2. Step 2: Convert to fraction form
    18,131.60/27,198.07 = 4,985/x
  3. Step 3: Cross multiply
    18,131.60x = 27,198.07 × 4,985
  4. Step 4: Simplify right side
    18,131.60x = 135,582,378.95
  5. Step 5: Solve for x
    x = 135,582,378.95/18,131.60
  6. Step 6: Final answer
    x = 7,477.68

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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.