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Finding the Fourth Proportional to 18,221.78, 27,332.70 and 5,909.78

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Solution

The fourth proportional to 18,221.78, 27,332.70 and 5,909.78 is: 8,864.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.78 : 27,332.70 = 5,909.78 : x
  2. Step 2: Convert to fraction form
    18,221.78/27,332.70 = 5,909.78/x
  3. Step 3: Cross multiply
    18,221.78x = 27,332.70 × 5,909.78
  4. Step 4: Simplify right side
    18,221.78x = 161,530,243.81
  5. Step 5: Solve for x
    x = 161,530,243.81/18,221.78
  6. Step 6: Final answer
    x = 8,864.68

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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.