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Finding the Fourth Proportional to 15,936.51, 21,992.00 and 9,221.21

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Solution

The fourth proportional to 15,936.51, 21,992.00 and 9,221.21 is: 12,725.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,936.51 : 21,992.00 = 9,221.21 : x
  2. Step 2: Convert to fraction form
    15,936.51/21,992.00 = 9,221.21/x
  3. Step 3: Cross multiply
    15,936.51x = 21,992.00 × 9,221.21
  4. Step 4: Simplify right side
    15,936.51x = 202,792,694.25
  5. Step 5: Solve for x
    x = 202,792,694.25/15,936.51
  6. Step 6: Final answer
    x = 12,725.04

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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.