Home / 18,974.48-28,438.63-13,429.42

Finding the Fourth Proportional to 18,974.48, 28,438.63 and 13,429.42

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Solution

The fourth proportional to 18,974.48, 28,438.63 and 13,429.42 is: 20,127.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.48 : 28,438.63 = 13,429.42 : x
  2. Step 2: Convert to fraction form
    18,974.48/28,438.63 = 13,429.42/x
  3. Step 3: Cross multiply
    18,974.48x = 28,438.63 × 13,429.42
  4. Step 4: Simplify right side
    18,974.48x = 381,914,201.82
  5. Step 5: Solve for x
    x = 381,914,201.82/18,974.48
  6. Step 6: Final answer
    x = 20,127.79

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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.