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Finding the Fourth Proportional to 18,171.20, 25,081.08 and 11,001.20

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Solution

The fourth proportional to 18,171.20, 25,081.08 and 11,001.20 is: 15,184.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,171.20 : 25,081.08 = 11,001.20 : x
  2. Step 2: Convert to fraction form
    18,171.20/25,081.08 = 11,001.20/x
  3. Step 3: Cross multiply
    18,171.20x = 25,081.08 × 11,001.20
  4. Step 4: Simplify right side
    18,171.20x = 275,921,977.30
  5. Step 5: Solve for x
    x = 275,921,977.30/18,171.20
  6. Step 6: Final answer
    x = 15,184.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.