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Finding the Fourth Proportional to 18,245.51, 25,128.45 and 15,726.68

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Solution

The fourth proportional to 18,245.51, 25,128.45 and 15,726.68 is: 21,659.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,245.51 : 25,128.45 = 15,726.68 : x
  2. Step 2: Convert to fraction form
    18,245.51/25,128.45 = 15,726.68/x
  3. Step 3: Cross multiply
    18,245.51x = 25,128.45 × 15,726.68
  4. Step 4: Simplify right side
    18,245.51x = 395,187,092.05
  5. Step 5: Solve for x
    x = 395,187,092.05/18,245.51
  6. Step 6: Final answer
    x = 21,659.42

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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.