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Finding the Fourth Proportional to 18,663.81, 27,934.67 and 10,217.61

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Solution

The fourth proportional to 18,663.81, 27,934.67 and 10,217.61 is: 15,292.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.81 : 27,934.67 = 10,217.61 : x
  2. Step 2: Convert to fraction form
    18,663.81/27,934.67 = 10,217.61/x
  3. Step 3: Cross multiply
    18,663.81x = 27,934.67 × 10,217.61
  4. Step 4: Simplify right side
    18,663.81x = 285,425,512.45
  5. Step 5: Solve for x
    x = 285,425,512.45/18,663.81
  6. Step 6: Final answer
    x = 15,292.99

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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.