Home / 12,142.39-18,195.87-5,379.82

Finding the Fourth Proportional to 12,142.39, 18,195.87 and 5,379.82

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Solution

The fourth proportional to 12,142.39, 18,195.87 and 5,379.82 is: 8,061.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142.39 : 18,195.87 = 5,379.82 : x
  2. Step 2: Convert to fraction form
    12,142.39/18,195.87 = 5,379.82/x
  3. Step 3: Cross multiply
    12,142.39x = 18,195.87 × 5,379.82
  4. Step 4: Simplify right side
    12,142.39x = 97,890,439.68
  5. Step 5: Solve for x
    x = 97,890,439.68/12,142.39
  6. Step 6: Final answer
    x = 8,061.87

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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.