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Finding the Fourth Proportional to 18,286.89, 27,431.28 and 5,807.89

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Solution

The fourth proportional to 18,286.89, 27,431.28 and 5,807.89 is: 8,712.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,286.89 : 27,431.28 = 5,807.89 : x
  2. Step 2: Convert to fraction form
    18,286.89/27,431.28 = 5,807.89/x
  3. Step 3: Cross multiply
    18,286.89x = 27,431.28 × 5,807.89
  4. Step 4: Simplify right side
    18,286.89x = 159,317,690.60
  5. Step 5: Solve for x
    x = 159,317,690.60/18,286.89
  6. Step 6: Final answer
    x = 8,712.13

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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.