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Finding the Fourth Proportional to 18,606.20, 27,895.91 and 8,739.99

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Solution

The fourth proportional to 18,606.20, 27,895.91 and 8,739.99 is: 13,103.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,606.20 : 27,895.91 = 8,739.99 : x
  2. Step 2: Convert to fraction form
    18,606.20/27,895.91 = 8,739.99/x
  3. Step 3: Cross multiply
    18,606.20x = 27,895.91 × 8,739.99
  4. Step 4: Simplify right side
    18,606.20x = 243,809,930.74
  5. Step 5: Solve for x
    x = 243,809,930.74/18,606.20
  6. Step 6: Final answer
    x = 13,103.70

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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.