Home / 12,129.32-18,198.84-3,810.62

Finding the Fourth Proportional to 12,129.32, 18,198.84 and 3,810.62

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Solution

The fourth proportional to 12,129.32, 18,198.84 and 3,810.62 is: 5,717.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.32 : 18,198.84 = 3,810.62 : x
  2. Step 2: Convert to fraction form
    12,129.32/18,198.84 = 3,810.62/x
  3. Step 3: Cross multiply
    12,129.32x = 18,198.84 × 3,810.62
  4. Step 4: Simplify right side
    12,129.32x = 69,348,863.68
  5. Step 5: Solve for x
    x = 69,348,863.68/12,129.32
  6. Step 6: Final answer
    x = 5,717.46

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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.