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Finding the Fourth Proportional to 18,220.92, 25,091.93 and 15,829.80

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Solution

The fourth proportional to 18,220.92, 25,091.93 and 15,829.80 is: 21,799.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.92 : 25,091.93 = 15,829.80 : x
  2. Step 2: Convert to fraction form
    18,220.92/25,091.93 = 15,829.80/x
  3. Step 3: Cross multiply
    18,220.92x = 25,091.93 × 15,829.80
  4. Step 4: Simplify right side
    18,220.92x = 397,200,233.51
  5. Step 5: Solve for x
    x = 397,200,233.51/18,220.92
  6. Step 6: Final answer
    x = 21,799.13

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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.