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Finding the Fourth Proportional to 13,644.40, 20,469.60 and 5,324.40

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Solution

The fourth proportional to 13,644.40, 20,469.60 and 5,324.40 is: 7,987.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,644.40 : 20,469.60 = 5,324.40 : x
  2. Step 2: Convert to fraction form
    13,644.40/20,469.60 = 5,324.40/x
  3. Step 3: Cross multiply
    13,644.40x = 20,469.60 × 5,324.40
  4. Step 4: Simplify right side
    13,644.40x = 108,988,338.24
  5. Step 5: Solve for x
    x = 108,988,338.24/13,644.40
  6. Step 6: Final answer
    x = 7,987.77

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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.