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Finding the Fourth Proportional to 18,139.82, 27,209.86 and 4,992.91

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Solution

The fourth proportional to 18,139.82, 27,209.86 and 4,992.91 is: 7,489.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.82 : 27,209.86 = 4,992.91 : x
  2. Step 2: Convert to fraction form
    18,139.82/27,209.86 = 4,992.91/x
  3. Step 3: Cross multiply
    18,139.82x = 27,209.86 × 4,992.91
  4. Step 4: Simplify right side
    18,139.82x = 135,856,301.59
  5. Step 5: Solve for x
    x = 135,856,301.59/18,139.82
  6. Step 6: Final answer
    x = 7,489.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.