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Finding the Fourth Proportional to 26,812.80, 40,228.80 and 11,235.20

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Solution

The fourth proportional to 26,812.80, 40,228.80 and 11,235.20 is: 16,856.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,812.80 : 40,228.80 = 11,235.20 : x
  2. Step 2: Convert to fraction form
    26,812.80/40,228.80 = 11,235.20/x
  3. Step 3: Cross multiply
    26,812.80x = 40,228.80 × 11,235.20
  4. Step 4: Simplify right side
    26,812.80x = 451,978,613.76
  5. Step 5: Solve for x
    x = 451,978,613.76/26,812.80
  6. Step 6: Final answer
    x = 16,856.82

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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.