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Finding the Fourth Proportional to 12,431.00, 18,617.78 and 7,489.73

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Solution

The fourth proportional to 12,431.00, 18,617.78 and 7,489.73 is: 11,217.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.00 : 18,617.78 = 7,489.73 : x
  2. Step 2: Convert to fraction form
    12,431.00/18,617.78 = 7,489.73/x
  3. Step 3: Cross multiply
    12,431.00x = 18,617.78 × 7,489.73
  4. Step 4: Simplify right side
    12,431.00x = 139,442,210.67
  5. Step 5: Solve for x
    x = 139,442,210.67/12,431.00
  6. Step 6: Final answer
    x = 11,217.29

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1.5x scale

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.