Home / 12,144.40-18,215.97-3,379.39

Finding the Fourth Proportional to 12,144.40, 18,215.97 and 3,379.39

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Solution

The fourth proportional to 12,144.40, 18,215.97 and 3,379.39 is: 5,068.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,144.40 : 18,215.97 = 3,379.39 : x
  2. Step 2: Convert to fraction form
    12,144.40/18,215.97 = 3,379.39/x
  3. Step 3: Cross multiply
    12,144.40x = 18,215.97 × 3,379.39
  4. Step 4: Simplify right side
    12,144.40x = 61,558,866.86
  5. Step 5: Solve for x
    x = 61,558,866.86/12,144.40
  6. Step 6: Final answer
    x = 5,068.91

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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.