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Finding the Fourth Proportional to 18,623.28, 27,897.42 and 8,613.92

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Solution

The fourth proportional to 18,623.28, 27,897.42 and 8,613.92 is: 12,903.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,623.28 : 27,897.42 = 8,613.92 : x
  2. Step 2: Convert to fraction form
    18,623.28/27,897.42 = 8,613.92/x
  3. Step 3: Cross multiply
    18,623.28x = 27,897.42 × 8,613.92
  4. Step 4: Simplify right side
    18,623.28x = 240,306,144.09
  5. Step 5: Solve for x
    x = 240,306,144.09/18,623.28
  6. Step 6: Final answer
    x = 12,903.53

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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.