Home / 13,631.72-20,447.56-4,272.46

Finding the Fourth Proportional to 13,631.72, 20,447.56 and 4,272.46

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Solution

The fourth proportional to 13,631.72, 20,447.56 and 4,272.46 is: 6,408.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.72 : 20,447.56 = 4,272.46 : x
  2. Step 2: Convert to fraction form
    13,631.72/20,447.56 = 4,272.46/x
  3. Step 3: Cross multiply
    13,631.72x = 20,447.56 × 4,272.46
  4. Step 4: Simplify right side
    13,631.72x = 87,361,382.20
  5. Step 5: Solve for x
    x = 87,361,382.20/13,631.72
  6. Step 6: Final answer
    x = 6,408.68

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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.