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Finding the Fourth Proportional to 39,751.53, 54,858.55 and 21,847.89

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Solution

The fourth proportional to 39,751.53, 54,858.55 and 21,847.89 is: 30,150.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,751.53 : 54,858.55 = 21,847.89 : x
  2. Step 2: Convert to fraction form
    39,751.53/54,858.55 = 21,847.89/x
  3. Step 3: Cross multiply
    39,751.53x = 54,858.55 × 21,847.89
  4. Step 4: Simplify right side
    39,751.53x = 1,198,543,758.02
  5. Step 5: Solve for x
    x = 1,198,543,758.02/39,751.53
  6. Step 6: Final answer
    x = 30,150.89

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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.