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Finding the Fourth Proportional to 18,489.11, 27,733.59 and 8,622.90

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Solution

The fourth proportional to 18,489.11, 27,733.59 and 8,622.90 is: 12,934.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.11 : 27,733.59 = 8,622.90 : x
  2. Step 2: Convert to fraction form
    18,489.11/27,733.59 = 8,622.90/x
  3. Step 3: Cross multiply
    18,489.11x = 27,733.59 × 8,622.90
  4. Step 4: Simplify right side
    18,489.11x = 239,143,973.21
  5. Step 5: Solve for x
    x = 239,143,973.21/18,489.11
  6. Step 6: Final answer
    x = 12,934.32

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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.