Home / 13,619.63-20,428.89-3,758.66

Finding the Fourth Proportional to 13,619.63, 20,428.89 and 3,758.66

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Solution

The fourth proportional to 13,619.63, 20,428.89 and 3,758.66 is: 5,637.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.63 : 20,428.89 = 3,758.66 : x
  2. Step 2: Convert to fraction form
    13,619.63/20,428.89 = 3,758.66/x
  3. Step 3: Cross multiply
    13,619.63x = 20,428.89 × 3,758.66
  4. Step 4: Simplify right side
    13,619.63x = 76,785,149.54
  5. Step 5: Solve for x
    x = 76,785,149.54/13,619.63
  6. Step 6: Final answer
    x = 5,637.83

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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.