Home / 13,520.72-20,272.40-5,628.70

Finding the Fourth Proportional to 13,520.72, 20,272.40 and 5,628.70

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Solution

The fourth proportional to 13,520.72, 20,272.40 and 5,628.70 is: 8,439.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.72 : 20,272.40 = 5,628.70 : x
  2. Step 2: Convert to fraction form
    13,520.72/20,272.40 = 5,628.70/x
  3. Step 3: Cross multiply
    13,520.72x = 20,272.40 × 5,628.70
  4. Step 4: Simplify right side
    13,520.72x = 114,107,257.88
  5. Step 5: Solve for x
    x = 114,107,257.88/13,520.72
  6. Step 6: Final answer
    x = 8,439.44

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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.