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Finding the Fourth Proportional to 18,009.60, 27,002.10 and 8,143.50

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Solution

The fourth proportional to 18,009.60, 27,002.10 and 8,143.50 is: 12,209.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,009.60 : 27,002.10 = 8,143.50 : x
  2. Step 2: Convert to fraction form
    18,009.60/27,002.10 = 8,143.50/x
  3. Step 3: Cross multiply
    18,009.60x = 27,002.10 × 8,143.50
  4. Step 4: Simplify right side
    18,009.60x = 219,891,601.35
  5. Step 5: Solve for x
    x = 219,891,601.35/18,009.60
  6. Step 6: Final answer
    x = 12,209.69

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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.