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Finding the Fourth Proportional to 26,921.81, 40,389.23 and 8,453.81

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Solution

The fourth proportional to 26,921.81, 40,389.23 and 8,453.81 is: 12,682.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,921.81 : 40,389.23 = 8,453.81 : x
  2. Step 2: Convert to fraction form
    26,921.81/40,389.23 = 8,453.81/x
  3. Step 3: Cross multiply
    26,921.81x = 40,389.23 × 8,453.81
  4. Step 4: Simplify right side
    26,921.81x = 341,442,998.57
  5. Step 5: Solve for x
    x = 341,442,998.57/26,921.81
  6. Step 6: Final answer
    x = 12,682.76

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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.