Home / 39,742.88-54,845.88-21,838.64

Finding the Fourth Proportional to 39,742.88, 54,845.88 and 21,838.64

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Solution

The fourth proportional to 39,742.88, 54,845.88 and 21,838.64 is: 30,137.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,742.88 : 54,845.88 = 21,838.64 : x
  2. Step 2: Convert to fraction form
    39,742.88/54,845.88 = 21,838.64/x
  3. Step 3: Cross multiply
    39,742.88x = 54,845.88 × 21,838.64
  4. Step 4: Simplify right side
    39,742.88x = 1,197,759,428.80
  5. Step 5: Solve for x
    x = 1,197,759,428.80/39,742.88
  6. Step 6: Final answer
    x = 30,137.71

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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.