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Finding the Fourth Proportional to 12,811.14, 17,679.48 and 7,146.27

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Solution

The fourth proportional to 12,811.14, 17,679.48 and 7,146.27 is: 9,861.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.14 : 17,679.48 = 7,146.27 : x
  2. Step 2: Convert to fraction form
    12,811.14/17,679.48 = 7,146.27/x
  3. Step 3: Cross multiply
    12,811.14x = 17,679.48 × 7,146.27
  4. Step 4: Simplify right side
    12,811.14x = 126,342,337.54
  5. Step 5: Solve for x
    x = 126,342,337.54/12,811.14
  6. Step 6: Final answer
    x = 9,861.91

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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.