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Finding the Fourth Proportional to 39,480.58, 54,481.65 and 21,575.80

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Solution

The fourth proportional to 39,480.58, 54,481.65 and 21,575.80 is: 29,773.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,480.58 : 54,481.65 = 21,575.80 : x
  2. Step 2: Convert to fraction form
    39,480.58/54,481.65 = 21,575.80/x
  3. Step 3: Cross multiply
    39,480.58x = 54,481.65 × 21,575.80
  4. Step 4: Simplify right side
    39,480.58x = 1,175,485,184.07
  5. Step 5: Solve for x
    x = 1,175,485,184.07/39,480.58
  6. Step 6: Final answer
    x = 29,773.76

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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.