Home / 20,189.10-27,874.68-12,638.49

Finding the Fourth Proportional to 20,189.10, 27,874.68 and 12,638.49

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Solution

The fourth proportional to 20,189.10, 27,874.68 and 12,638.49 is: 17,449.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.10 : 27,874.68 = 12,638.49 : x
  2. Step 2: Convert to fraction form
    20,189.10/27,874.68 = 12,638.49/x
  3. Step 3: Cross multiply
    20,189.10x = 27,874.68 × 12,638.49
  4. Step 4: Simplify right side
    20,189.10x = 352,293,864.43
  5. Step 5: Solve for x
    x = 352,293,864.43/20,189.10
  6. Step 6: Final answer
    x = 17,449.71

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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.