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Finding the Fourth Proportional to 53,758.58, 80,628.41 and 20,480.64

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Solution

The fourth proportional to 53,758.58, 80,628.41 and 20,480.64 is: 30,717.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,758.58 : 80,628.41 = 20,480.64 : x
  2. Step 2: Convert to fraction form
    53,758.58/80,628.41 = 20,480.64/x
  3. Step 3: Cross multiply
    53,758.58x = 80,628.41 × 20,480.64
  4. Step 4: Simplify right side
    53,758.58x = 1,651,321,187.83
  5. Step 5: Solve for x
    x = 1,651,321,187.83/53,758.58
  6. Step 6: Final answer
    x = 30,717.35

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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.