Home / 13,121.12-19,642.68-13,103.84

Finding the Fourth Proportional to 13,121.12, 19,642.68 and 13,103.84

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Solution

The fourth proportional to 13,121.12, 19,642.68 and 13,103.84 is: 19,616.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.12 : 19,642.68 = 13,103.84 : x
  2. Step 2: Convert to fraction form
    13,121.12/19,642.68 = 13,103.84/x
  3. Step 3: Cross multiply
    13,121.12x = 19,642.68 × 13,103.84
  4. Step 4: Simplify right side
    13,121.12x = 257,394,535.89
  5. Step 5: Solve for x
    x = 257,394,535.89/13,121.12
  6. Step 6: Final answer
    x = 19,616.81

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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.