Home / 20,874.48-28,806.68-12,382.44

Finding the Fourth Proportional to 20,874.48, 28,806.68 and 12,382.44

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Solution

The fourth proportional to 20,874.48, 28,806.68 and 12,382.44 is: 17,087.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.48 : 28,806.68 = 12,382.44 : x
  2. Step 2: Convert to fraction form
    20,874.48/28,806.68 = 12,382.44/x
  3. Step 3: Cross multiply
    20,874.48x = 28,806.68 × 12,382.44
  4. Step 4: Simplify right side
    20,874.48x = 356,696,986.70
  5. Step 5: Solve for x
    x = 356,696,986.70/20,874.48
  6. Step 6: Final answer
    x = 17,087.71

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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.