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Finding the Fourth Proportional to 51,221.80, 76,842.96 and 21,639.52

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Solution

The fourth proportional to 51,221.80, 76,842.96 and 21,639.52 is: 32,463.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,221.80 : 76,842.96 = 21,639.52 : x
  2. Step 2: Convert to fraction form
    51,221.80/76,842.96 = 21,639.52/x
  3. Step 3: Cross multiply
    51,221.80x = 76,842.96 × 21,639.52
  4. Step 4: Simplify right side
    51,221.80x = 1,662,844,769.78
  5. Step 5: Solve for x
    x = 1,662,844,769.78/51,221.80
  6. Step 6: Final answer
    x = 32,463.61

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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.