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Finding the Fourth Proportional to 18,525.47, 27,788.09 and 7,424.21

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Solution

The fourth proportional to 18,525.47, 27,788.09 and 7,424.21 is: 11,136.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,525.47 : 27,788.09 = 7,424.21 : x
  2. Step 2: Convert to fraction form
    18,525.47/27,788.09 = 7,424.21/x
  3. Step 3: Cross multiply
    18,525.47x = 27,788.09 × 7,424.21
  4. Step 4: Simplify right side
    18,525.47x = 206,304,439.60
  5. Step 5: Solve for x
    x = 206,304,439.60/18,525.47
  6. Step 6: Final answer
    x = 11,136.26

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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.