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Finding the Fourth Proportional to 18,838, 25,997.25 and 10,454.50

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Solution

The fourth proportional to 18,838, 25,997.25 and 10,454.50 is: 14,427.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838 : 25,997.25 = 10,454.50 : x
  2. Step 2: Convert to fraction form
    18,838/25,997.25 = 10,454.50/x
  3. Step 3: Cross multiply
    18,838x = 25,997.25 × 10,454.50
  4. Step 4: Simplify right side
    18,838x = 271,788,250.13
  5. Step 5: Solve for x
    x = 271,788,250.13/18,838
  6. Step 6: Final answer
    x = 14,427.66

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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.