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Finding the Fourth Proportional to 39,957.90, 59,917.70 and 18,880.39

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Solution

The fourth proportional to 39,957.90, 59,917.70 and 18,880.39 is: 28,311.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,957.90 : 59,917.70 = 18,880.39 : x
  2. Step 2: Convert to fraction form
    39,957.90/59,917.70 = 18,880.39/x
  3. Step 3: Cross multiply
    39,957.90x = 59,917.70 × 18,880.39
  4. Step 4: Simplify right side
    39,957.90x = 1,131,269,449.50
  5. Step 5: Solve for x
    x = 1,131,269,449.50/39,957.90
  6. Step 6: Final answer
    x = 28,311.54

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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.