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Finding the Fourth Proportional to 18,638.62, 25,721.78 and 10,141.22

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Solution

The fourth proportional to 18,638.62, 25,721.78 and 10,141.22 is: 13,995.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.62 : 25,721.78 = 10,141.22 : x
  2. Step 2: Convert to fraction form
    18,638.62/25,721.78 = 10,141.22/x
  3. Step 3: Cross multiply
    18,638.62x = 25,721.78 × 10,141.22
  4. Step 4: Simplify right side
    18,638.62x = 260,850,243.37
  5. Step 5: Solve for x
    x = 260,850,243.37/18,638.62
  6. Step 6: Final answer
    x = 13,995.15

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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.