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Finding the Fourth Proportional to 18,175.20, 27,259.20 and 8,815.20

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Solution

The fourth proportional to 18,175.20, 27,259.20 and 8,815.20 is: 13,221.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,175.20 : 27,259.20 = 8,815.20 : x
  2. Step 2: Convert to fraction form
    18,175.20/27,259.20 = 8,815.20/x
  3. Step 3: Cross multiply
    18,175.20x = 27,259.20 × 8,815.20
  4. Step 4: Simplify right side
    18,175.20x = 240,295,299.84
  5. Step 5: Solve for x
    x = 240,295,299.84/18,175.20
  6. Step 6: Final answer
    x = 13,221.05

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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.