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Finding the Fourth Proportional to 18,612.87, 27,918.77 and 5,465.49

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Solution

The fourth proportional to 18,612.87, 27,918.77 and 5,465.49 is: 8,198.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.87 : 27,918.77 = 5,465.49 : x
  2. Step 2: Convert to fraction form
    18,612.87/27,918.77 = 5,465.49/x
  3. Step 3: Cross multiply
    18,612.87x = 27,918.77 × 5,465.49
  4. Step 4: Simplify right side
    18,612.87x = 152,589,730.92
  5. Step 5: Solve for x
    x = 152,589,730.92/18,612.87
  6. Step 6: Final answer
    x = 8,198.08

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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.