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Finding the Fourth Proportional to 18,421.42, 27,644.89 and 7,326.97

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Solution

The fourth proportional to 18,421.42, 27,644.89 and 7,326.97 is: 10,995.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.42 : 27,644.89 = 7,326.97 : x
  2. Step 2: Convert to fraction form
    18,421.42/27,644.89 = 7,326.97/x
  3. Step 3: Cross multiply
    18,421.42x = 27,644.89 × 7,326.97
  4. Step 4: Simplify right side
    18,421.42x = 202,553,279.68
  5. Step 5: Solve for x
    x = 202,553,279.68/18,421.42
  6. Step 6: Final answer
    x = 10,995.53

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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.