Home / 38,972.54-53,781.78-21,067.40

Finding the Fourth Proportional to 38,972.54, 53,781.78 and 21,067.40

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Solution

The fourth proportional to 38,972.54, 53,781.78 and 21,067.40 is: 29,072.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,972.54 : 53,781.78 = 21,067.40 : x
  2. Step 2: Convert to fraction form
    38,972.54/53,781.78 = 21,067.40/x
  3. Step 3: Cross multiply
    38,972.54x = 53,781.78 × 21,067.40
  4. Step 4: Simplify right side
    38,972.54x = 1,133,042,271.97
  5. Step 5: Solve for x
    x = 1,133,042,271.97/38,972.54
  6. Step 6: Final answer
    x = 29,072.84

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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.