Home / 20,457.52-28,230.88-13,383.79

Finding the Fourth Proportional to 20,457.52, 28,230.88 and 13,383.79

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Solution

The fourth proportional to 20,457.52, 28,230.88 and 13,383.79 is: 18,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.52 : 28,230.88 = 13,383.79 : x
  2. Step 2: Convert to fraction form
    20,457.52/28,230.88 = 13,383.79/x
  3. Step 3: Cross multiply
    20,457.52x = 28,230.88 × 13,383.79
  4. Step 4: Simplify right side
    20,457.52x = 377,836,169.44
  5. Step 5: Solve for x
    x = 377,836,169.44/20,457.52
  6. Step 6: Final answer
    x = 18,469.30

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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.