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Finding the Fourth Proportional to 18,018.72, 27,004.32 and 10,977.12

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Solution

The fourth proportional to 18,018.72, 27,004.32 and 10,977.12 is: 16,451.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,018.72 : 27,004.32 = 10,977.12 : x
  2. Step 2: Convert to fraction form
    18,018.72/27,004.32 = 10,977.12/x
  3. Step 3: Cross multiply
    18,018.72x = 27,004.32 × 10,977.12
  4. Step 4: Simplify right side
    18,018.72x = 296,429,661.16
  5. Step 5: Solve for x
    x = 296,429,661.16/18,018.72
  6. Step 6: Final answer
    x = 16,451.21

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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.