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Finding the Fourth Proportional to 18,603.20, 27,911.64 and 8,612.75

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Solution

The fourth proportional to 18,603.20, 27,911.64 and 8,612.75 is: 12,922.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.20 : 27,911.64 = 8,612.75 : x
  2. Step 2: Convert to fraction form
    18,603.20/27,911.64 = 8,612.75/x
  3. Step 3: Cross multiply
    18,603.20x = 27,911.64 × 8,612.75
  4. Step 4: Simplify right side
    18,603.20x = 240,395,977.41
  5. Step 5: Solve for x
    x = 240,395,977.41/18,603.20
  6. Step 6: Final answer
    x = 12,922.29

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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.