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Finding the Fourth Proportional to 18,138.15, 27,181.89 and 9,800.19

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Solution

The fourth proportional to 18,138.15, 27,181.89 and 9,800.19 is: 14,686.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.15 : 27,181.89 = 9,800.19 : x
  2. Step 2: Convert to fraction form
    18,138.15/27,181.89 = 9,800.19/x
  3. Step 3: Cross multiply
    18,138.15x = 27,181.89 × 9,800.19
  4. Step 4: Simplify right side
    18,138.15x = 266,387,686.56
  5. Step 5: Solve for x
    x = 266,387,686.56/18,138.15
  6. Step 6: Final answer
    x = 14,686.60

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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.