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Finding the Fourth Proportional to 39,786.40, 59,650.80 and 16,400.80

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Solution

The fourth proportional to 39,786.40, 59,650.80 and 16,400.80 is: 24,589.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,786.40 : 59,650.80 = 16,400.80 : x
  2. Step 2: Convert to fraction form
    39,786.40/59,650.80 = 16,400.80/x
  3. Step 3: Cross multiply
    39,786.40x = 59,650.80 × 16,400.80
  4. Step 4: Simplify right side
    39,786.40x = 978,320,840.64
  5. Step 5: Solve for x
    x = 978,320,840.64/39,786.40
  6. Step 6: Final answer
    x = 24,589.33

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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.