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Finding the Fourth Proportional to 18,138.76, 27,218.52 and 7,044.01

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Solution

The fourth proportional to 18,138.76, 27,218.52 and 7,044.01 is: 10,570.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.76 : 27,218.52 = 7,044.01 : x
  2. Step 2: Convert to fraction form
    18,138.76/27,218.52 = 7,044.01/x
  3. Step 3: Cross multiply
    18,138.76x = 27,218.52 × 7,044.01
  4. Step 4: Simplify right side
    18,138.76x = 191,727,631.93
  5. Step 5: Solve for x
    x = 191,727,631.93/18,138.76
  6. Step 6: Final answer
    x = 10,570.05

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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.