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Finding the Fourth Proportional to 8,631.08, 11,906.22 and 7,130.12

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Solution

The fourth proportional to 8,631.08, 11,906.22 and 7,130.12 is: 9,835.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.08 : 11,906.22 = 7,130.12 : x
  2. Step 2: Convert to fraction form
    8,631.08/11,906.22 = 7,130.12/x
  3. Step 3: Cross multiply
    8,631.08x = 11,906.22 × 7,130.12
  4. Step 4: Simplify right side
    8,631.08x = 84,892,777.35
  5. Step 5: Solve for x
    x = 84,892,777.35/8,631.08
  6. Step 6: Final answer
    x = 9,835.71

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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.