Home / 13,620.38-20,430.02-3,759.41

Finding the Fourth Proportional to 13,620.38, 20,430.02 and 3,759.41

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Solution

The fourth proportional to 13,620.38, 20,430.02 and 3,759.41 is: 5,638.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.38 : 20,430.02 = 3,759.41 : x
  2. Step 2: Convert to fraction form
    13,620.38/20,430.02 = 3,759.41/x
  3. Step 3: Cross multiply
    13,620.38x = 20,430.02 × 3,759.41
  4. Step 4: Simplify right side
    13,620.38x = 76,804,700.54
  5. Step 5: Solve for x
    x = 76,804,700.54/13,620.38
  6. Step 6: Final answer
    x = 5,638.95

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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.