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Finding the Fourth Proportional to 18,599.81, 27,899.35 and 5,451.89

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Solution

The fourth proportional to 18,599.81, 27,899.35 and 5,451.89 is: 8,177.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,599.81 : 27,899.35 = 5,451.89 : x
  2. Step 2: Convert to fraction form
    18,599.81/27,899.35 = 5,451.89/x
  3. Step 3: Cross multiply
    18,599.81x = 27,899.35 × 5,451.89
  4. Step 4: Simplify right side
    18,599.81x = 152,104,034.15
  5. Step 5: Solve for x
    x = 152,104,034.15/18,599.81
  6. Step 6: Final answer
    x = 8,177.72

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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.