Home / 12,319.11-18,480.78-3,998.91

Finding the Fourth Proportional to 12,319.11, 18,480.78 and 3,998.91

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Solution

The fourth proportional to 12,319.11, 18,480.78 and 3,998.91 is: 5,999.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,319.11 : 18,480.78 = 3,998.91 : x
  2. Step 2: Convert to fraction form
    12,319.11/18,480.78 = 3,998.91/x
  3. Step 3: Cross multiply
    12,319.11x = 18,480.78 × 3,998.91
  4. Step 4: Simplify right side
    12,319.11x = 73,902,975.95
  5. Step 5: Solve for x
    x = 73,902,975.95/12,319.11
  6. Step 6: Final answer
    x = 5,999.05

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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.