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Finding the Fourth Proportional to 13,129, 19,693.50 and 3,401

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Solution

The fourth proportional to 13,129, 19,693.50 and 3,401 is: 5,101.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129 : 19,693.50 = 3,401 : x
  2. Step 2: Convert to fraction form
    13,129/19,693.50 = 3,401/x
  3. Step 3: Cross multiply
    13,129x = 19,693.50 × 3,401
  4. Step 4: Simplify right side
    13,129x = 66,977,593.50
  5. Step 5: Solve for x
    x = 66,977,593.50/13,129
  6. Step 6: Final answer
    x = 5,101.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.