Home / 12,318.70-18,480.98-3,998.74

Finding the Fourth Proportional to 12,318.70, 18,480.98 and 3,998.74

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Solution

The fourth proportional to 12,318.70, 18,480.98 and 3,998.74 is: 5,999.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.70 : 18,480.98 = 3,998.74 : x
  2. Step 2: Convert to fraction form
    12,318.70/18,480.98 = 3,998.74/x
  3. Step 3: Cross multiply
    12,318.70x = 18,480.98 × 3,998.74
  4. Step 4: Simplify right side
    12,318.70x = 73,900,633.97
  5. Step 5: Solve for x
    x = 73,900,633.97/12,318.70
  6. Step 6: Final answer
    x = 5,999.06

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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.