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Finding the Fourth Proportional to 39,469.46, 54,467.79 and 21,564.46

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Solution

The fourth proportional to 39,469.46, 54,467.79 and 21,564.46 is: 29,758.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,469.46 : 54,467.79 = 21,564.46 : x
  2. Step 2: Convert to fraction form
    39,469.46/54,467.79 = 21,564.46/x
  3. Step 3: Cross multiply
    39,469.46x = 54,467.79 × 21,564.46
  4. Step 4: Simplify right side
    39,469.46x = 1,174,568,478.74
  5. Step 5: Solve for x
    x = 1,174,568,478.74/39,469.46
  6. Step 6: Final answer
    x = 29,758.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.