Home / 20,139.97-27,788.68-12,182.02

Finding the Fourth Proportional to 20,139.97, 27,788.68 and 12,182.02

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Solution

The fourth proportional to 20,139.97, 27,788.68 and 12,182.02 is: 16,808.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.97 : 27,788.68 = 12,182.02 : x
  2. Step 2: Convert to fraction form
    20,139.97/27,788.68 = 12,182.02/x
  3. Step 3: Cross multiply
    20,139.97x = 27,788.68 × 12,182.02
  4. Step 4: Simplify right side
    20,139.97x = 338,522,305.50
  5. Step 5: Solve for x
    x = 338,522,305.50/20,139.97
  6. Step 6: Final answer
    x = 16,808.48

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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.