Home / 39,644.28-54,709.07-21,739.57

Finding the Fourth Proportional to 39,644.28, 54,709.07 and 21,739.57

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Solution

The fourth proportional to 39,644.28, 54,709.07 and 21,739.57 is: 30,000.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,644.28 : 54,709.07 = 21,739.57 : x
  2. Step 2: Convert to fraction form
    39,644.28/54,709.07 = 21,739.57/x
  3. Step 3: Cross multiply
    39,644.28x = 54,709.07 × 21,739.57
  4. Step 4: Simplify right side
    39,644.28x = 1,189,351,656.90
  5. Step 5: Solve for x
    x = 1,189,351,656.90/39,644.28
  6. Step 6: Final answer
    x = 30,000.59

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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.