Home / 20,139.84-27,792.91-12,179.77

Finding the Fourth Proportional to 20,139.84, 27,792.91 and 12,179.77

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Solution

The fourth proportional to 20,139.84, 27,792.91 and 12,179.77 is: 16,808.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.84 : 27,792.91 = 12,179.77 : x
  2. Step 2: Convert to fraction form
    20,139.84/27,792.91 = 12,179.77/x
  3. Step 3: Cross multiply
    20,139.84x = 27,792.91 × 12,179.77
  4. Step 4: Simplify right side
    20,139.84x = 338,511,251.43
  5. Step 5: Solve for x
    x = 338,511,251.43/20,139.84
  6. Step 6: Final answer
    x = 16,808.04

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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.