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Finding the Fourth Proportional to 18,587.81, 27,857.11 and 8,709.41

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Solution

The fourth proportional to 18,587.81, 27,857.11 and 8,709.41 is: 13,052.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,587.81 : 27,857.11 = 8,709.41 : x
  2. Step 2: Convert to fraction form
    18,587.81/27,857.11 = 8,709.41/x
  3. Step 3: Cross multiply
    18,587.81x = 27,857.11 × 8,709.41
  4. Step 4: Simplify right side
    18,587.81x = 242,618,831.35
  5. Step 5: Solve for x
    x = 242,618,831.35/18,587.81
  6. Step 6: Final answer
    x = 13,052.58

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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.