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Finding the Fourth Proportional to 39,863.82, 59,722.80 and 18,821.24

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Solution

The fourth proportional to 39,863.82, 59,722.80 and 18,821.24 is: 28,197.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,863.82 : 59,722.80 = 18,821.24 : x
  2. Step 2: Convert to fraction form
    39,863.82/59,722.80 = 18,821.24/x
  3. Step 3: Cross multiply
    39,863.82x = 59,722.80 × 18,821.24
  4. Step 4: Simplify right side
    39,863.82x = 1,124,057,152.27
  5. Step 5: Solve for x
    x = 1,124,057,152.27/39,863.82
  6. Step 6: Final answer
    x = 28,197.43

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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.