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Finding the Fourth Proportional to 18,009.20, 27,013.80 and 9,261.20

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Solution

The fourth proportional to 18,009.20, 27,013.80 and 9,261.20 is: 13,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,009.20 : 27,013.80 = 9,261.20 : x
  2. Step 2: Convert to fraction form
    18,009.20/27,013.80 = 9,261.20/x
  3. Step 3: Cross multiply
    18,009.20x = 27,013.80 × 9,261.20
  4. Step 4: Simplify right side
    18,009.20x = 250,180,204.56
  5. Step 5: Solve for x
    x = 250,180,204.56/18,009.20
  6. Step 6: Final answer
    x = 13,891.80

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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.