Home / 39,838-54,980.10-21,936.64

Finding the Fourth Proportional to 39,838, 54,980.10 and 21,936.64

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Solution

The fourth proportional to 39,838, 54,980.10 and 21,936.64 is: 30,274.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,838 : 54,980.10 = 21,936.64 : x
  2. Step 2: Convert to fraction form
    39,838/54,980.10 = 21,936.64/x
  3. Step 3: Cross multiply
    39,838x = 54,980.10 × 21,936.64
  4. Step 4: Simplify right side
    39,838x = 1,206,078,660.86
  5. Step 5: Solve for x
    x = 1,206,078,660.86/39,838
  6. Step 6: Final answer
    x = 30,274.58

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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.