Home / 21,481.20-29,653.35-20,136.18

Finding the Fourth Proportional to 21,481.20, 29,653.35 and 20,136.18

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Solution

The fourth proportional to 21,481.20, 29,653.35 and 20,136.18 is: 27,796.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,481.20 : 29,653.35 = 20,136.18 : x
  2. Step 2: Convert to fraction form
    21,481.20/29,653.35 = 20,136.18/x
  3. Step 3: Cross multiply
    21,481.20x = 29,653.35 × 20,136.18
  4. Step 4: Simplify right side
    21,481.20x = 597,105,193.20
  5. Step 5: Solve for x
    x = 597,105,193.20/21,481.20
  6. Step 6: Final answer
    x = 27,796.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.