Home / 20,917.84-28,869.22-11,964.10

Finding the Fourth Proportional to 20,917.84, 28,869.22 and 11,964.10

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Solution

The fourth proportional to 20,917.84, 28,869.22 and 11,964.10 is: 16,511.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.84 : 28,869.22 = 11,964.10 : x
  2. Step 2: Convert to fraction form
    20,917.84/28,869.22 = 11,964.10/x
  3. Step 3: Cross multiply
    20,917.84x = 28,869.22 × 11,964.10
  4. Step 4: Simplify right side
    20,917.84x = 345,394,235.00
  5. Step 5: Solve for x
    x = 345,394,235.00/20,917.84
  6. Step 6: Final answer
    x = 16,511.95

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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.