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Finding the Fourth Proportional to 38,907, 53,692.20 and 22,140

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Solution

The fourth proportional to 38,907, 53,692.20 and 22,140 is: 30,553.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,907 : 53,692.20 = 22,140 : x
  2. Step 2: Convert to fraction form
    38,907/53,692.20 = 22,140/x
  3. Step 3: Cross multiply
    38,907x = 53,692.20 × 22,140
  4. Step 4: Simplify right side
    38,907x = 1,188,745,308
  5. Step 5: Solve for x
    x = 1,188,745,308/38,907
  6. Step 6: Final answer
    x = 30,553.51

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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.