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Finding the Fourth Proportional to 18,653.31, 27,979.97 and 17,512.83

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Solution

The fourth proportional to 18,653.31, 27,979.97 and 17,512.83 is: 26,269.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.31 : 27,979.97 = 17,512.83 : x
  2. Step 2: Convert to fraction form
    18,653.31/27,979.97 = 17,512.83/x
  3. Step 3: Cross multiply
    18,653.31x = 27,979.97 × 17,512.83
  4. Step 4: Simplify right side
    18,653.31x = 490,008,370.45
  5. Step 5: Solve for x
    x = 490,008,370.45/18,653.31
  6. Step 6: Final answer
    x = 26,269.25

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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.