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Finding the Fourth Proportional to 18,006.68, 27,018.12 and 11,431.10

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Solution

The fourth proportional to 18,006.68, 27,018.12 and 11,431.10 is: 17,151.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,006.68 : 27,018.12 = 11,431.10 : x
  2. Step 2: Convert to fraction form
    18,006.68/27,018.12 = 11,431.10/x
  3. Step 3: Cross multiply
    18,006.68x = 27,018.12 × 11,431.10
  4. Step 4: Simplify right side
    18,006.68x = 308,846,831.53
  5. Step 5: Solve for x
    x = 308,846,831.53/18,006.68
  6. Step 6: Final answer
    x = 17,151.79

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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.