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Finding the Fourth Proportional to 13,177, 19,765.50 and 3,943

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Solution

The fourth proportional to 13,177, 19,765.50 and 3,943 is: 5,914.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,177 : 19,765.50 = 3,943 : x
  2. Step 2: Convert to fraction form
    13,177/19,765.50 = 3,943/x
  3. Step 3: Cross multiply
    13,177x = 19,765.50 × 3,943
  4. Step 4: Simplify right side
    13,177x = 77,935,366.50
  5. Step 5: Solve for x
    x = 77,935,366.50/13,177
  6. Step 6: Final answer
    x = 5,914.50

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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.