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Finding the Fourth Proportional to 13,520.70, 20,266.20 and 4,751.10

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Solution

The fourth proportional to 13,520.70, 20,266.20 and 4,751.10 is: 7,121.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.70 : 20,266.20 = 4,751.10 : x
  2. Step 2: Convert to fraction form
    13,520.70/20,266.20 = 4,751.10/x
  3. Step 3: Cross multiply
    13,520.70x = 20,266.20 × 4,751.10
  4. Step 4: Simplify right side
    13,520.70x = 96,286,742.82
  5. Step 5: Solve for x
    x = 96,286,742.82/13,520.70
  6. Step 6: Final answer
    x = 7,121.43

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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.