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Finding the Fourth Proportional to 18,489.91, 25,512.06 and 10,936.66

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Solution

The fourth proportional to 18,489.91, 25,512.06 and 10,936.66 is: 15,090.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.91 : 25,512.06 = 10,936.66 : x
  2. Step 2: Convert to fraction form
    18,489.91/25,512.06 = 10,936.66/x
  3. Step 3: Cross multiply
    18,489.91x = 25,512.06 × 10,936.66
  4. Step 4: Simplify right side
    18,489.91x = 279,016,726.12
  5. Step 5: Solve for x
    x = 279,016,726.12/18,489.91
  6. Step 6: Final answer
    x = 15,090.22

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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.