Home / 18,317.37-27,481.54-12,990.81

Finding the Fourth Proportional to 18,317.37, 27,481.54 and 12,990.81

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Solution

The fourth proportional to 18,317.37, 27,481.54 and 12,990.81 is: 19,490.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,317.37 : 27,481.54 = 12,990.81 : x
  2. Step 2: Convert to fraction form
    18,317.37/27,481.54 = 12,990.81/x
  3. Step 3: Cross multiply
    18,317.37x = 27,481.54 × 12,990.81
  4. Step 4: Simplify right side
    18,317.37x = 357,007,464.65
  5. Step 5: Solve for x
    x = 357,007,464.65/18,317.37
  6. Step 6: Final answer
    x = 19,490.11

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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.