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Finding the Fourth Proportional to 18,618.15, 27,911.52 and 8,080.23

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Solution

The fourth proportional to 18,618.15, 27,911.52 and 8,080.23 is: 12,113.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.15 : 27,911.52 = 8,080.23 : x
  2. Step 2: Convert to fraction form
    18,618.15/27,911.52 = 8,080.23/x
  3. Step 3: Cross multiply
    18,618.15x = 27,911.52 × 8,080.23
  4. Step 4: Simplify right side
    18,618.15x = 225,531,501.25
  5. Step 5: Solve for x
    x = 225,531,501.25/18,618.15
  6. Step 6: Final answer
    x = 12,113.53

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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.