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Finding the Fourth Proportional to 25,139, 34,692.90 and 13,961

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Solution

The fourth proportional to 25,139, 34,692.90 and 13,961 is: 19,266.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,139 : 34,692.90 = 13,961 : x
  2. Step 2: Convert to fraction form
    25,139/34,692.90 = 13,961/x
  3. Step 3: Cross multiply
    25,139x = 34,692.90 × 13,961
  4. Step 4: Simplify right side
    25,139x = 484,347,576.90
  5. Step 5: Solve for x
    x = 484,347,576.90/25,139
  6. Step 6: Final answer
    x = 19,266.78

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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.