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Finding the Fourth Proportional to 13,769.70, 20,621.71 and 7,520.37

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Solution

The fourth proportional to 13,769.70, 20,621.71 and 7,520.37 is: 11,262.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,769.70 : 20,621.71 = 7,520.37 : x
  2. Step 2: Convert to fraction form
    13,769.70/20,621.71 = 7,520.37/x
  3. Step 3: Cross multiply
    13,769.70x = 20,621.71 × 7,520.37
  4. Step 4: Simplify right side
    13,769.70x = 155,082,889.23
  5. Step 5: Solve for x
    x = 155,082,889.23/13,769.70
  6. Step 6: Final answer
    x = 11,262.62

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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.