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Finding the Fourth Proportional to 34,443.20, 51,664.80 and 21,310.40

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Solution

The fourth proportional to 34,443.20, 51,664.80 and 21,310.40 is: 31,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,443.20 : 51,664.80 = 21,310.40 : x
  2. Step 2: Convert to fraction form
    34,443.20/51,664.80 = 21,310.40/x
  3. Step 3: Cross multiply
    34,443.20x = 51,664.80 × 21,310.40
  4. Step 4: Simplify right side
    34,443.20x = 1,100,997,553.92
  5. Step 5: Solve for x
    x = 1,100,997,553.92/34,443.20
  6. Step 6: Final answer
    x = 31,965.60

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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.