Home / 12,720.66-19,081.92-3,956.16

Finding the Fourth Proportional to 12,720.66, 19,081.92 and 3,956.16

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Solution

The fourth proportional to 12,720.66, 19,081.92 and 3,956.16 is: 5,934.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.66 : 19,081.92 = 3,956.16 : x
  2. Step 2: Convert to fraction form
    12,720.66/19,081.92 = 3,956.16/x
  3. Step 3: Cross multiply
    12,720.66x = 19,081.92 × 3,956.16
  4. Step 4: Simplify right side
    12,720.66x = 75,491,128.63
  5. Step 5: Solve for x
    x = 75,491,128.63/12,720.66
  6. Step 6: Final answer
    x = 5,934.53

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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.