Home / 21,782.20-32,629.54-18,436.09

Finding the Fourth Proportional to 21,782.20, 32,629.54 and 18,436.09

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Solution

The fourth proportional to 21,782.20, 32,629.54 and 18,436.09 is: 27,617.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,782.20 : 32,629.54 = 18,436.09 : x
  2. Step 2: Convert to fraction form
    21,782.20/32,629.54 = 18,436.09/x
  3. Step 3: Cross multiply
    21,782.20x = 32,629.54 × 18,436.09
  4. Step 4: Simplify right side
    21,782.20x = 601,561,136.10
  5. Step 5: Solve for x
    x = 601,561,136.10/21,782.20
  6. Step 6: Final answer
    x = 27,617.10

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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.