Home / 39,775.57-54,890.31-21,871.78

Finding the Fourth Proportional to 39,775.57, 54,890.31 and 21,871.78

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Solution

The fourth proportional to 39,775.57, 54,890.31 and 21,871.78 is: 30,183.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,775.57 : 54,890.31 = 21,871.78 : x
  2. Step 2: Convert to fraction form
    39,775.57/54,890.31 = 21,871.78/x
  3. Step 3: Cross multiply
    39,775.57x = 54,890.31 × 21,871.78
  4. Step 4: Simplify right side
    39,775.57x = 1,200,548,784.45
  5. Step 5: Solve for x
    x = 1,200,548,784.45/39,775.57
  6. Step 6: Final answer
    x = 30,183.07

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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.