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Finding the Fourth Proportional to 12,751.29, 17,591.75 and 7,372.75

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Solution

The fourth proportional to 12,751.29, 17,591.75 and 7,372.75 is: 10,171.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.29 : 17,591.75 = 7,372.75 : x
  2. Step 2: Convert to fraction form
    12,751.29/17,591.75 = 7,372.75/x
  3. Step 3: Cross multiply
    12,751.29x = 17,591.75 × 7,372.75
  4. Step 4: Simplify right side
    12,751.29x = 129,699,521.62
  5. Step 5: Solve for x
    x = 129,699,521.62/12,751.29
  6. Step 6: Final answer
    x = 10,171.48

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1.5x scale

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.