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Finding the Fourth Proportional to 18,221.31, 27,331.97 and 5,074.03

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Solution

The fourth proportional to 18,221.31, 27,331.97 and 5,074.03 is: 7,611.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.31 : 27,331.97 = 5,074.03 : x
  2. Step 2: Convert to fraction form
    18,221.31/27,331.97 = 5,074.03/x
  3. Step 3: Cross multiply
    18,221.31x = 27,331.97 × 5,074.03
  4. Step 4: Simplify right side
    18,221.31x = 138,683,235.74
  5. Step 5: Solve for x
    x = 138,683,235.74/18,221.31
  6. Step 6: Final answer
    x = 7,611.05

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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.