Home / 20,945.97-28,909.85-13,284.27

Finding the Fourth Proportional to 20,945.97, 28,909.85 and 13,284.27

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Solution

The fourth proportional to 20,945.97, 28,909.85 and 13,284.27 is: 18,335.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.97 : 28,909.85 = 13,284.27 : x
  2. Step 2: Convert to fraction form
    20,945.97/28,909.85 = 13,284.27/x
  3. Step 3: Cross multiply
    20,945.97x = 28,909.85 × 13,284.27
  4. Step 4: Simplify right side
    20,945.97x = 384,046,186.64
  5. Step 5: Solve for x
    x = 384,046,186.64/20,945.97
  6. Step 6: Final answer
    x = 18,335.09

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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.