Home / 20,949.92-28,910.84-11,518.64

Finding the Fourth Proportional to 20,949.92, 28,910.84 and 11,518.64

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Solution

The fourth proportional to 20,949.92, 28,910.84 and 11,518.64 is: 15,895.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.92 : 28,910.84 = 11,518.64 : x
  2. Step 2: Convert to fraction form
    20,949.92/28,910.84 = 11,518.64/x
  3. Step 3: Cross multiply
    20,949.92x = 28,910.84 × 11,518.64
  4. Step 4: Simplify right side
    20,949.92x = 333,013,558.06
  5. Step 5: Solve for x
    x = 333,013,558.06/20,949.92
  6. Step 6: Final answer
    x = 15,895.70

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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.