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Finding the Fourth Proportional to 18,443.19, 27,640.47 and 6,745.17

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Solution

The fourth proportional to 18,443.19, 27,640.47 and 6,745.17 is: 10,108.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,443.19 : 27,640.47 = 6,745.17 : x
  2. Step 2: Convert to fraction form
    18,443.19/27,640.47 = 6,745.17/x
  3. Step 3: Cross multiply
    18,443.19x = 27,640.47 × 6,745.17
  4. Step 4: Simplify right side
    18,443.19x = 186,439,669.03
  5. Step 5: Solve for x
    x = 186,439,669.03/18,443.19
  6. Step 6: Final answer
    x = 10,108.86

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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.