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Finding the Fourth Proportional to 18,000.80, 27,001.20 and 6,309.80

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Solution

The fourth proportional to 18,000.80, 27,001.20 and 6,309.80 is: 9,464.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,000.80 : 27,001.20 = 6,309.80 : x
  2. Step 2: Convert to fraction form
    18,000.80/27,001.20 = 6,309.80/x
  3. Step 3: Cross multiply
    18,000.80x = 27,001.20 × 6,309.80
  4. Step 4: Simplify right side
    18,000.80x = 170,372,171.76
  5. Step 5: Solve for x
    x = 170,372,171.76/18,000.80
  6. Step 6: Final answer
    x = 9,464.70

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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.