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Finding the Fourth Proportional to 8,147.56, 11,243.64 and 4,421.56

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Solution

The fourth proportional to 8,147.56, 11,243.64 and 4,421.56 is: 6,101.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,147.56 : 11,243.64 = 4,421.56 : x
  2. Step 2: Convert to fraction form
    8,147.56/11,243.64 = 4,421.56/x
  3. Step 3: Cross multiply
    8,147.56x = 11,243.64 × 4,421.56
  4. Step 4: Simplify right side
    8,147.56x = 49,714,428.88
  5. Step 5: Solve for x
    x = 49,714,428.88/8,147.56
  6. Step 6: Final answer
    x = 6,101.76

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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.