Home / 39,824.60-54,958.32-21,920.00

Finding the Fourth Proportional to 39,824.60, 54,958.32 and 21,920.00

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Solution

The fourth proportional to 39,824.60, 54,958.32 and 21,920.00 is: 30,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,824.60 : 54,958.32 = 21,920.00 : x
  2. Step 2: Convert to fraction form
    39,824.60/54,958.32 = 21,920.00/x
  3. Step 3: Cross multiply
    39,824.60x = 54,958.32 × 21,920.00
  4. Step 4: Simplify right side
    39,824.60x = 1,204,686,099.61
  5. Step 5: Solve for x
    x = 1,204,686,099.61/39,824.60
  6. Step 6: Final answer
    x = 30,249.80

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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.