Home / 39,739.78-54,840.86-21,834.75

Finding the Fourth Proportional to 39,739.78, 54,840.86 and 21,834.75

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Solution

The fourth proportional to 39,739.78, 54,840.86 and 21,834.75 is: 30,131.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,739.78 : 54,840.86 = 21,834.75 : x
  2. Step 2: Convert to fraction form
    39,739.78/54,840.86 = 21,834.75/x
  3. Step 3: Cross multiply
    39,739.78x = 54,840.86 × 21,834.75
  4. Step 4: Simplify right side
    39,739.78x = 1,197,436,467.89
  5. Step 5: Solve for x
    x = 1,197,436,467.89/39,739.78
  6. Step 6: Final answer
    x = 30,131.94

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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.