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Finding the Fourth Proportional to 18,639.73, 27,959.91 and 5,489.11

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Solution

The fourth proportional to 18,639.73, 27,959.91 and 5,489.11 is: 8,233.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.73 : 27,959.91 = 5,489.11 : x
  2. Step 2: Convert to fraction form
    18,639.73/27,959.91 = 5,489.11/x
  3. Step 3: Cross multiply
    18,639.73x = 27,959.91 × 5,489.11
  4. Step 4: Simplify right side
    18,639.73x = 153,475,021.58
  5. Step 5: Solve for x
    x = 153,475,021.58/18,639.73
  6. Step 6: Final answer
    x = 8,233.76

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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.