Home / 13,629.20-20,443.80-4,395.20

Finding the Fourth Proportional to 13,629.20, 20,443.80 and 4,395.20

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Solution

The fourth proportional to 13,629.20, 20,443.80 and 4,395.20 is: 6,592.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.20 : 20,443.80 = 4,395.20 : x
  2. Step 2: Convert to fraction form
    13,629.20/20,443.80 = 4,395.20/x
  3. Step 3: Cross multiply
    13,629.20x = 20,443.80 × 4,395.20
  4. Step 4: Simplify right side
    13,629.20x = 89,854,589.76
  5. Step 5: Solve for x
    x = 89,854,589.76/13,629.20
  6. Step 6: Final answer
    x = 6,592.80

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1.5x scale

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.