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Finding the Fourth Proportional to 39,847.50, 54,989.50 and 21,942.55

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Solution

The fourth proportional to 39,847.50, 54,989.50 and 21,942.55 is: 30,280.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,847.50 : 54,989.50 = 21,942.55 : x
  2. Step 2: Convert to fraction form
    39,847.50/54,989.50 = 21,942.55/x
  3. Step 3: Cross multiply
    39,847.50x = 54,989.50 × 21,942.55
  4. Step 4: Simplify right side
    39,847.50x = 1,206,609,853.23
  5. Step 5: Solve for x
    x = 1,206,609,853.23/39,847.50
  6. Step 6: Final answer
    x = 30,280.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.