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Finding the Fourth Proportional to 18,616.56, 27,924.82 and 5,478.15

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Solution

The fourth proportional to 18,616.56, 27,924.82 and 5,478.15 is: 8,217.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.56 : 27,924.82 = 5,478.15 : x
  2. Step 2: Convert to fraction form
    18,616.56/27,924.82 = 5,478.15/x
  3. Step 3: Cross multiply
    18,616.56x = 27,924.82 × 5,478.15
  4. Step 4: Simplify right side
    18,616.56x = 152,976,352.68
  5. Step 5: Solve for x
    x = 152,976,352.68/18,616.56
  6. Step 6: Final answer
    x = 8,217.22

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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.