Home / 20,511.97-28,313.55-12,016.82

Finding the Fourth Proportional to 20,511.97, 28,313.55 and 12,016.82

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Solution

The fourth proportional to 20,511.97, 28,313.55 and 12,016.82 is: 16,587.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.97 : 28,313.55 = 12,016.82 : x
  2. Step 2: Convert to fraction form
    20,511.97/28,313.55 = 12,016.82/x
  3. Step 3: Cross multiply
    20,511.97x = 28,313.55 × 12,016.82
  4. Step 4: Simplify right side
    20,511.97x = 340,238,773.83
  5. Step 5: Solve for x
    x = 340,238,773.83/20,511.97
  6. Step 6: Final answer
    x = 16,587.33

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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.