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Finding the Fourth Proportional to 41,398.40, 62,138.80 and 19,216.80

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Solution

The fourth proportional to 41,398.40, 62,138.80 and 19,216.80 is: 28,844.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,398.40 : 62,138.80 = 19,216.80 : x
  2. Step 2: Convert to fraction form
    41,398.40/62,138.80 = 19,216.80/x
  3. Step 3: Cross multiply
    41,398.40x = 62,138.80 × 19,216.80
  4. Step 4: Simplify right side
    41,398.40x = 1,194,108,891.84
  5. Step 5: Solve for x
    x = 1,194,108,891.84/41,398.40
  6. Step 6: Final answer
    x = 28,844.32

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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.