Home / 13,620.48-20,430.30-3,760.36

Finding the Fourth Proportional to 13,620.48, 20,430.30 and 3,760.36

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Solution

The fourth proportional to 13,620.48, 20,430.30 and 3,760.36 is: 5,640.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.48 : 20,430.30 = 3,760.36 : x
  2. Step 2: Convert to fraction form
    13,620.48/20,430.30 = 3,760.36/x
  3. Step 3: Cross multiply
    13,620.48x = 20,430.30 × 3,760.36
  4. Step 4: Simplify right side
    13,620.48x = 76,825,282.91
  5. Step 5: Solve for x
    x = 76,825,282.91/13,620.48
  6. Step 6: Final answer
    x = 5,640.42

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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.