Home / 21,660.72-29,893.54-17,221.12

Finding the Fourth Proportional to 21,660.72, 29,893.54 and 17,221.12

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Solution

The fourth proportional to 21,660.72, 29,893.54 and 17,221.12 is: 23,766.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.72 : 29,893.54 = 17,221.12 : x
  2. Step 2: Convert to fraction form
    21,660.72/29,893.54 = 17,221.12/x
  3. Step 3: Cross multiply
    21,660.72x = 29,893.54 × 17,221.12
  4. Step 4: Simplify right side
    21,660.72x = 514,800,239.56
  5. Step 5: Solve for x
    x = 514,800,239.56/21,660.72
  6. Step 6: Final answer
    x = 23,766.53

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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.