Home / 12,318.09-18,479.83-3,998.94

Finding the Fourth Proportional to 12,318.09, 18,479.83 and 3,998.94

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Solution

The fourth proportional to 12,318.09, 18,479.83 and 3,998.94 is: 5,999.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.09 : 18,479.83 = 3,998.94 : x
  2. Step 2: Convert to fraction form
    12,318.09/18,479.83 = 3,998.94/x
  3. Step 3: Cross multiply
    12,318.09x = 18,479.83 × 3,998.94
  4. Step 4: Simplify right side
    12,318.09x = 73,899,731.38
  5. Step 5: Solve for x
    x = 73,899,731.38/12,318.09
  6. Step 6: Final answer
    x = 5,999.28

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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.